Reference & Education Mathematics

strategygamesios sportsappsios puzzlegamesios

Using Axiological Identities

 Some of the axiological trigometric identities are those acquired from the Pythagorean Theorem. These are authentic using a appropriate triangle:By the Pythagorean Theorem,:A^2+B^2=C^2 Dividing through by C2 gives:left(frac ight)^2+left(frac ight)^2=left(frac ight)^2=1 We accept already the sine of a in this case as A/C and the cosine of a as B/C. Appropriately we can acting these into to get:sin^2 a + cos^2 a = 1Related identities include::sin^2 a = 1 - cos^2 amboxcos^2 a = 1-sin^2 a: an^2 a + 1 = sec^2 ambox an^2 a = sec^2 a -1:1 + cot^2 a = csc^2 amboxcot^2 a = csc^2 a -1Other Axiological Identities cover the Reciprocal, Ratio, and Co-function identitiesReciprocal identities:csc a = fracquadsec a = fracquadcot a = fracRatio identities: an a = fracquadcot a = fracCo-function identities (in radians):cos a = sinleft(frac-a ight)quad csc a = secleft(frac-a ight)quad cot a = anleft(frac-a ight)... Read More by user

Distributions Geometric

 Geometric Administration refers to the anticipation of the amount of times bare to do something until accepting a adapted result. For example:Just like the , the Geometric administration has one controling parameter: The anticipation of success in any absolute test.If a accidental capricious X is broadcast with a Geometric Administration with a constant p we address its as:Pleft( X=i ight) =pleft( 1-p ight)^With a Geometric Administration it is aswell appealing simple to account the anticipation of a added than n times case. The anticipation of declining to accomplish the capital aftereffect is left( 1-p ight)^k.Example: a apprentice comes home from a affair in the forest, in which were consumed. The apprentice is aggravating to acquisition the key to his foreground door, out of a keychain with 10 altered keys. What is the anticipation of the apprentice afterwards in the 4th trial?Pleft( X=4 ight) =fracleft( 1-frac ight)^=fracleft( frac ight)^=0.0729... Read More by user

Detached mathematics Bound accompaniment automata

 Formally, a Deterministc Bound Apparatus is a 5-tuple D = (Q, Sigma, delta, s, F) where:Q is the set of all states. Sigma is the alphabet getting considered. delta is the set of transitions, including absolutely one alteration per aspect of the alphabet per state. s is the individual starting state. F is the set of all accepting states. Similarly, the academic analogue of a Nondeterministic Bound Apparatus is a 5-tuple N = (Q, Sigma, delta, s, F) where:Q is the set of all states. Sigma is the alphabet getting considered. delta is the set of transitions, with epsilon transitions and any amount of transitions for any accurate ascribe on every state. s is the individual starting state. F is the set of all accepting states. Note that for both a NFA and a DFA, s is not a set of states. Rather, it is a individual state, as neither can activate at added than one state. However, a NFA can accomplish agnate action by abacus a new starting accompaniment and epsilon-transitioning to all adapted s... Read More by user

Geometry Vertical Angles

 Vertical angles are a brace of angles with a accepted acme whose abandon anatomy adverse rays. An abundantly advantageous actuality about vertical angles is that they are congruent. Abreast from adage that any brace of vertical angles acutely accept the aforementioned admeasurement by inspection, we can prove this actuality with some simple algebra and an ascertainment about added angles. Let two curve bisect at a point, and angles A1 and A2 be a brace of vertical angles appropriately formed. At the point of intersection, two additional angles are aswell formed, and able-bodied alarm either one of them B1 after accident of generality. Back B1 and A1 are supplementary, we can say that the admeasurement of B1 additional the admeasurement of A1 is 180. Similarly, the admeasurement of B1 additional the admeasurement of A2 is 180. Appropriately the admeasurement of A1 additional the admeasurement of B1 equals the admeasurement of A2 additional the admeasurement of B1, by substitution. Then ... Read More by user

Academy of Mathematics Aesthetics of Mathematics

 This is advised to become the Software for a advance on the Aesthetics of Mathematics. It may then serve as base for books and additional abstracts as able-bodied as discussions and research.Also see the altercation page of this module.This is an anterior meta affiliate on the affair and the advance of Aesthetics of Mathematics (PhilM). It ability be accessible for chief on demography this advance as able-bodied as for compassionate its approach.Understanding the actual development of PhilM ...Our Mathematician is cerebration about her degrees of abandon she has while accomplishing her job. Assuredly she starts to catechism the foundations of the Mathematicians job.How to do the Mathematicians every day job? How to accomplishment the degrees of abandon a Mathematician has in accomplishing a Proof, anticipation the accent of Sentences and abuse Theories?How well-founded is Mathematics? Is there a bigger Mathematics than the one we apply today?Questons apropos absolution and use:Further ... Read More by user

Foundation of algebraic concepts

 {||-|bgcolor=#E6CFDD style=border:1px solid #cfcfcf;padding:1em;padding-top:0.5em;padding-bottom:0em;| Foundation of algebraic concepts An |-|bgcolor=#F4E3F3 style=border:1px solid #cfcfcf;padding:1em;padding-top:0.5em;padding-bottom:0em;|This advance aims to ensure that the apprentice will accept a applied and abstract base for the appliance of algebraic ability in fields that crave it or in approaching mathematics courses.To alpha this course, you should have:not accessible yetnot accessible yetI am actuality searching for a adventitious to learn. Any agents actuality ?... Read More by user
Tags: foundation, solid

Adjustment for Factoring

 In math, the way you get to the actual acknowledgment is just as important as accepting the appropriate answer.Sometimes the way one gets the acknowledgment can be anticipation of a proof. Humans dont usually usethe chat affidavit if talking about addition problems, but I anticipate it is a acceptable abstraction and goodhabit to get into. This is a adjustment of accomplishing prime factorization that constructs a affidavit thatyour acknowledgment is actual as you access at the answer. It keeps you from accepting absent andshows your work. Added importantly, I anticipate it helps you accept the process. Itstarts out actual easy, so that beginners can use it, but after on lets you skip some stepsto save time.The basal point of prime factorization is to yield a amount and acquisition the prime factors.Since anniversary prime agency may action added than once, for archetype in the amount 4, whichhas prime factors (2,2), we understand that the factors of a amount are not a set but a multi-... Read More by user


 The chat anticipation agency a amount that represents how acceptable something is to happen.If something is actually assertive to happen, we say its anticipation is one. If something is impossible, we say its anticipation is zero. A amount amid aught and one agency we dont understand for abiding what will happen, but the college the amount the added acceptable something is to happen. If something has a anticipation of 0.8, alotof humans would say it apparently will happen.Since were using algebraic to advice us accept what will happen, it may advice us to be able to address an blueprint like this:Pr(X) = yIf this blueprint is true, we would say the anticipation of X accident is y. For example, we can say:X = A bread bung advancing up headsPr(X) = 0.5Since the letter X is continuing for an event, not a number, and we dont wish to get them confused, able-bodied use basic belletrist for events, and lower-case belletrist for numbers. The attribute Pr represents a action that has some accur... Read More by user
Tags: things, getting, little, basic, numbers, seven, together, event, values, events, represent, faces, rolls, outcomes

Testing Data z-tests

 The Absent Antecedent should be an acceptance apropos the amount of the citizenry mean. The data should abide of a individual sample of quantitative data from the population.The sample should be fatigued from a citizenry from which the Accepted Aberration (or Variance) is known. Also, the abstinent capricious (typically listed as x—ar x is the sample statistic) should accept a Accustomed Distribution.Note that if the administration of the capricious in the citizenry is non-normal (or unknown), the z-test can still be acclimated for almost results, provided the sample admeasurement is abundantly large. Historically, sample sizes of at atomic 30 accept been advised abundantly large; absoluteness is (of course) abundant added complicated, but this aphorism of deride is still in use in some textbooks.If the citizenry Accepted Aberration is unknown, then a z-test is about not appropriate. However, if the sample admeasurement is large, the sample accepted aberration can be acclimated ... Read More by user

Handbook of Anecdotic Statistics Measures of Statistical Airheadedness About-face

 Describe in detail actuality data sets and purposes on which it is alotof useful. Call aswell data sets for which it may accord ambiguous results.A blueprint for artful the about-face σ2 of a citizenry of admeasurement N is::sigma^2 = frac 1N sum_^N (x_i - mu)^2 = frac 1Nsum_^N x_i^2 - mu^2 Where::mu = frac 1N sum_^N x_istands for the citizenry mean.A blueprint for artful the sample about-face s2, the aloof admiration of the citizenry variance, from a sample of admeasurement n, is::s^2 = frac 1 sum_^n (x_i - ar)^2 = frac Where::ar = frac 1n sum_^n x_istands for the sample mean.Therefore a simple algorithm to account about-face can be declared by the afterward : double sum;double sum_sqr;double variance;long n = data.length; // the amount of elements in the data arrangement (the absolute syntax is language-specific)for i = 0 to n sum += data[i]; sum_sqr += ( data[i] end forvariance = ((n Another algorithm which avoids ample numbers in sum_sqr while accretion up double avg;double... Read More by user
Tags: problems, point, system, numbers, measures, small, statistics, sample, formula, second

Handbook of Anecdotic Statistics Measures of Axial Addiction Addition Beggarly

 Most frequently acclimated admeasurement of axial tendency. :overline = frac1nsum_^n x_iWikipedia article: For a accustomed distribution, the accepted absurdity of the beggarly is::σM = σ / sqrt(N)Include any another methods of calculation, abnormally for ample data sets, or if additional measures accept already been calculated.It is almost simple to actuate the addition mean, or average, in Microsoft Excel (v. 97, 2000, 2002/XP) by using a simple equation. Chase these accomplish to actuate the beggarly in Excel for a set of data:# Highlight an abandoned corpuscle in the worksheet in which the beggarly will be calculated.# Bold that there are ten data credibility in beef A1 through A10, the afterward blueprint could be typed in the abandoned cell: =AVERAGE(A1:A10). Alternatively, this blueprint can aswell acquire arguments in the form: =AVERAGE(A1,A2,A3,...,A10)Refer to Microsoft Excels appliance affidavit for added help.In Minitab (v. 14), award the addition beggarly is as... Read More by user

Handbook of Anecdotic Statistics Types of Statistical Variables

 Statistical variables can be classified as follows:The akin of altitude of a capricious in mathematics and statistics describes how abundant advice the numbers associated with the capricious contain. Altered algebraic operations on variables are possible, depending on the akin at which a capricious is measured. In statistics, the kinds of anecdotic statistics and acceptation tests that are adapted depend on the akin of altitude of the variables concerned.Four levels of altitude are usually recognised:Interval and/or arrangement altitude are sometimes referred to as true measurement, admitting this acceptance reflects a abridgement of compassionate of the uses of cardinal measurement. However, it is alone quantities abstinent on arrangement scales that can accurately be said to accept units of measurement.Continuous variables are those variables that accept apparently an absolute amount of gradations amid two measurements. For example, physique weight of individuals, milk crop of beasts... Read More by user

Handbook of Anecdotic Statistics Arrangement

 This a arrangement for how an access in the Handbook of Anecdotic Statistics should look. Amuse archetype and adhesive the antecedent of this page if creating a new entry.Describe in detail actuality data sets and purposes on which it is alotof useful. Call aswell data sets for which it may accord ambiguous results.Include any another methods of calculation, abnormally for ample data sets, or if additional measures accept already been calculated.(An example: already you accept the count, sum, sum of squares, cubes and fourth admiral for a data set, you can then use these to calmly account the Mean, Std. Dev, Skew and Kurtosis, rather than accepting to go through the absolute dataset assorted times artful differences.)Include how it is accessed in accepted statistical packages, if known.Can aswell accommodate links to antecedent cipher samples for artful it, etc.... Read More by user

Adding numbers

 When multiplying, you do a amount times addition number.When you accept 3 x 5, you add 5 three times. 5 + 5 + 5 = 15, so 3 x 5 = 15.When you accept 4 x 5, you add 5 four times. 5 + 5 + 5 + 5 = 20, so 4 x 5 = 20Multiplying with numbers that end with a 0, is actual simple. You just add a 0 to your answer.For example, to accumulate 5 x 30The first affair you do is 5 x 3, that is 15.Then you add the 0 to the answer. 150There is a appropriate adjustment for adding big numbers, it goes like this:The big numbers are 275 x 52You address down on a section of paper 275 52 ---- xThe first affair you do is adding the 2 from 52 times the 5 from 275.2 x 5 = 10, you address 10 beneath the band and it will attending like this: 275 52 ---- x 10After that, you accumulate the 2 with 7 and add one 0, because its the additional number.2 x 7 = 14, add a 0, 140You address that down: 275 52 ---- x 10 140Then again, accumulate the 2 with the additional 2 from 275, and add 2 0s, its the third number.2 x 2 =4, a... Read More by user
Tags: times, child, children, write, method, thing


 Fractions are in aspect the aforementioned as division, about we use them added generally to accurate numbers beneath than one - for instance a bisected or a quater. Fractions accept a nominator (on the top) and a denominator (on the bottom). If a atom is beyond than 1 then the nominator will be larger.----Todays avant-garde methods of teaching algebraic and fractions are acutely altered than how they were accomplished just 10 years ago. The aberration of these methods is that they analyze in aspect the beheld affirmation which shows that accomplishing some blazon of abetment in fractions is true and do not artlessly use variables at first to accurate them. In my acquaintance the means in how they acclimated fractions is by about using asphalt diagrams (which, in the future, may advice them with their algebra skills)There is conceivably little accent these canicule which shows the busy decision that algebraic requires. Acceptance acclimated to be accomplished alone by equation, but to ... Read More by user

Adding numbers

 Subtracting numbers and abacus numbers should be accomplished together, the action of teaching addition is the aforementioned as teaching addition. You should not advise accouchement abrogating numbers at a adolescent age as there is no way to physically appearance them a abrogating number.----As with accession it is important for accouchement to bethink the simple combitations of individual chiffre numbers. Affective to 2 chiffre accession (having learnt abode values), alpha with simple problems: 45 -32 3 10then add 45 -32 13To get the answer.When this is grasped move on to harder problems: 52 -35 == 17To accomplishment the sum. Actuality acceptance charge to understand what 20-3 is: This is easiest to attending at as 10+10-3 and then understand that 10-3 is 7 (again, numbers abacus to 10).... Read More by user
Tags: addition, numbers

Testing Data compare-prop2

 A active archetype from the 2004 American Presidential Chase follows. It should be bright that the best of poll and who is arch is extraneous to the presentation of the concepts. According to an October 2nd Poll by ([ link]), 47% of 1,013 registered would vote for / if the acclamation were captivated today. 45% would vote for /, and 2% would vote for /.::=sqrt(A1::=normdist((A1-B1),0,A2,1)The aloft argument ability be abundant to do the all-important calculation, it doesnt accord to the compassionate of the statistical analysis involved. Abundant too generally humans anticipate statistics is a amount of adding with circuitous formulas. So actuality is the problem:Let p be the citizenry atom of the registered voters who vote for Kerry and q additionally for Bush. In a poll n = 1013 respondents are asked to accompaniment their choice. A amount of K respondents says to accept Kerry, a amount B says to vote for Bush. K and B are accidental ... Read More by user

Testing Data Purpose

 In general, the purpose of statistical tests is to actuate whethersome antecedent is acutely absurd accustomed empiric data. Agenda thatthere are two abstract approaches to such tests. The first approach,significance testing (due to Fisher), is aimed at quantifying the affirmation adjoin a accurate antecedent getting true. The additional approach, hypothesistesting (due to Neyman and Pearson), is aimed at authoritative a simple decisionas to whether to adios or absorb a hypothesis. The aberration is importantin that the appraisal of affirmation takes abode in ambience and will advance toopinions that can be revised if new affirmation becomes available. However,once a accommodation has been taken, it is final and cannot be changed. Thisimportant aberration is frequently disregarded and statisticians oftentreat the agreement acceptation analysis and antecedent analysis as admitting theyare interchangeable. They are not!A data analyst frequently wants to understand whether there is a diff... Read More by user
Tags: women, average, purpose, testing, tests, assumption, frequently, sample, evidence, hypothesis

Algebra Systems of Equations

 In a antecedent chapter, analytic for a individual alien in one blueprint was already covered. However, there are situations if added than one alien capricious is present in added than one equation. If in a accustomed problem, added than one algebraic blueprint is true at a time, it is said there is a arrangement of accompanying equations which are all true calm at once. Such sets of assorted equations may advice break for added than one alien capricious in a problem, back accepting added than one alien in one blueprint is about not abundant advice to break any of the unknowns.An alien abundance is something that needs algebraic advice in adjustment to break it. An blueprint involving the alien is about a section of advice which may accommodate the advice to break the unknown, i. e. to actuate a specific amount amount (or bound amount of detached values) that the alien is (or can be) according to. If analytic for a individual unknown, accessible number(s) which will create the blueprin... Read More by user

Activated Algebraic Basics

 =Applied Algebraic Basics=This book covers basal addition concepts including accomplished numbers, decimals, fractions, and English and metric measurements. Advisory accent is on appliance to archetypal problems one would appointment in the workplace. Simple and yet able algorithms (methods) are acclimated to break them.Furthermore you should apprehension that all digits actuality absorb the abject 10 calculation system.=Basic Algebraic Terminology=The system, sometimes referred to as abject 10, contains a absolute of ten identifiers alleged . The decimal arrangement is broadly acclimated because bodies accept ten fingers on which to count. For now, we will apathy additional for the account of artlessness with the compassionate that the decimal arrangement is not unique.The ten digits of the decimal system, abiding from everyman to greatest, are:The decimal arrangement uses to represent numbers beyond than 9. This agency that a digits position in affiliation to additional digits affect... Read More by user



Pages :  1 2 3 4 5 6 7 8 9 10 Next >>