121. Thabit Summary Gives information on background and contributions to non-euclidean geometry, spherical trigonometry, number theory and the field of statics. Was an important translator of Greek materials, including Euclid s Elements, during the Middle Ages. http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Thabit.html

Al-Sabi Thabit ibn Qurra al-Harrani Click the picture above to see a larger version Thabit ibn Qurra was an important Islamic mathematician who worked on number theory, astronomy and statics. Full MacTutor biography [Version for printing] List of References (29 books/articles) Mathematicians born in the same country Honours awarded to Thabit (Click below for those honoured in this way) Lunar features Crater Thebit Other Web sites Encyclopaedia Britannica Muslim scientists Previous (Chronologically) Next Main Index Previous (Alphabetically) Next Biographies index JOC/EFR © November 1999 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Thabit.html

122. Math Forum - Ask Dr. Math Archives: Middle School Pi Dr Math answers over 60 questions submitted by people about pi including questions on the Bible s relationship to it and its relationship to trigonometry. http://mathforum.org/library/drmath/sets/mid_pi.html

Ask Dr. Math Middle School Archive Dr. Math Home Elementary Middle School High School ... Dr. Math FAQ TOPICS This page: pi Search Dr. Math See also the Dr. Math FAQ Pi = 3.14159... Internet Library pi T2T FAQ pi day MIDDLE SCHOOL About Math Algebra equations factoring expressions ... Word Problems Browse Middle School Pi Stars indicate particularly interesting answers or good places to begin browsing. Accuracy in Measurement Since pi is irrational, either the circumference or the diameter of a circle must be irrational. How is that possible? Calculating Pi - Brent-Salamin Algorithm Can you show me a simple method to calculate pi accurately to an arbitrary number of digits? Facts about Pi What are some interesting facts about pi? Finding Pi: Buffon's Needle Method I was hoping to find a surprising way of finding pi using a needle and parallel lines... Formula for Pi I would like to know the formula for Pi that was used to calculate out to the bazillionth digit for the memory contests. Pi and the Area of Circles If pi truly goes on and on forever without repeating, is it impossible to find the exact area of a circle?

123. Math Competition Problem Writing Service Mathematics problems for middle school and high school math competitions with topics range from algebra and geometry to probability and trigonometry. http://www.virtu-software.com/math/

Math Competition Problem Writing Service With many difficulty levels, and problems covering all topics in the high school mathematics curriculum. Experienced problem writer has written problems for various local and state competitions. Home Level 1 Level 2 Level 3 ... Links Of Interest Creative And Challenging Math Problems For Competitions Doug Twitchell, the creator of such educational websites as The Problem Site Tile Puzzler , and Fifteen Minutes Of Fiction , has been involved in mathematics competitions since childhood, and has continued his involvement over the years as a problem writer and proofreader. Twitchell is a former competitor and award winner in a variety of state and national math competitions. He has won awards and recognition in leagues such as MAML, NEML, ASMA, NEAML, and in 1986 ranked in the top 150 nationally in the prestigious William Lowell Putnam exam. In the past two decades, Twitchell has proofread problems for the Maine Association of Math Leagues, as well as writing problems for the Maine State Math Meet, the Maine Algebra and Geometry League, as well as leagues in other states. Writing And Proofing Twitchell's problems are carefully crafted and written, with diagrams where appropriate, all cleanly formatted for printing. Each problem is proofed to guarrantee both accuracy and clarity. Proofing is done by a high school math teacher and math team coach, and the proofing cost is included.

124. Welcome To Gainesville State College! Held in the spring of each year, the competition features both individual and team events involving problems from calculus, trigonometry, geometry, statistics, and algebra. http://www.gc.peachnet.edu/math/tournament/

var MSOWebPartPageFormName = 'aspnetForm'; HOME SEARCH FAQS CONTACT US ... Oconee Campus Quick Links Banner Web Catalog eLearning E-Mail Employee Directory Employment Financial Aid Fitness Center Four-Year Degrees Giving to GSC Library Programs of Study Student Forms Student Lookup University Center USG Ethics Hotline Award-winning Writer Sharyn McCrumb at GSC - 11/10 GSC Anthropology Exhibit - 11/4-6 GSC Updates LS Suspension Policy - Fall 2010 Independent Film Festival ... Important Note Regarding Freshman Admissions EVENTS ACADEMIC DATES GSC Anthropology Exhibit 11/4-6 "Artistic Discovery: The Congressional Art Competition" Breakfast w/ CAB STOP STRESSING! ... Gainesville Campus 3820 Mundy Mill Rd Oakwood, GA 30566 P. O. Box 1358 Gainesville, GA 30503 Oconee Campus 1201 Bishop Farms Pkwy P. O. Box 1748 Watkinsville, GA 30677 Home Prospective Students Current Students Continuing Education ... University System of GA

125. Arc Distance Formula By James Q. Jacobs Finding the shortest distance between two points on the earth given latitude and longitude. Download ARC_CALC_3, Microsoft Excel version, A Spherical Triangle Calculator by James Q. Jacobs. http://www.jqjacobs.net/astro/arc_form.html

Spherical Trigonometry Calculator by James Q. Jacobs Finding the shortest distance between two points on the earth given latitude and longitude Download ARC_CALC_3 This small program will do the calculations (shown below) in an Excel spreadsheet. You only need to input the coordinates. The program supports input of three sites and calculates the three arc distances, the area of the spherical triangle and the bearings between sites. Arc Distance Formula (below) Most spreadsheet programs should be able to import this file format. The graphic below illustrates the spreadsheet, before corrections on July 24, 2002. Previous downloads have "A to C" and "B to C" labels swapped for arcs and bearings. Please let me know if there are other bugs in the applet. Epoch_v2009 Temporal Epoch Calculator is a similar Excel spreadsheet. It calculates the temporal changes in astronomic constants, just enter a date.

126. AP Calculus At Batesville High School Readiness for calculus review quizzes covering functions, graphing, trigonometry, and precalculus. http://www.batesville.k12.in.us/physics/calcnet/

127. Calculators And Education Technology By Texas Instruments - US And Canada Compact, easy to use, reliable computer algebra software. It intelligently applies the rules of algebra, trigonometry, calculus and matrix algebra to solve a wide range of mathematical problems. This nonnumeric approach goes far beyond the capabilities of dedicated statistics packages and equation solvers that use only approximate numerical techniques. http://www.ti.com/calc/docs/derive.htm

128. MCA Learning Units Features selected learning modules for arithmetic, algebra, geometry, trigonometry, statistics and probability. Includes some resource links. http://www.staff.vu.edu.au/mcaonline/units/index.html

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129. MATH-abundance Tutorial covers trigonometry, vectors, lines,complex numbers, cubic equations sequences and limits, continuity derivatives, minimum and maximum values, exponential and logarithmic functions, hyperbolic functions, finding roots of equations, integration, polar coordinates and integration. http://www.ping.be/~ping1339/

MATH-abundance Main Purpose = MATH TUTORIALS TUTORIALS : Topics; Solved and unsolved problems Math links to links to math links ... Home Page = http://home.scarlet.be/math/ Last update: 6 oct 2010 NIEUW : MATH-abundance Nederlandstalige versie Main Purpose = MATH TUTORIALS The main purpose of this site is to provide the net with an 'upper secondary' MATH TUTORIAL The order of the topics is not random. Most of them appeal on the properties and formulas stated in a preceding topic. You can find headword-links of the tutorials in the MATH-TUTORIALS INDEX See Copying Conditions TUTORIALS : Topics; Solved and unsolved problems Trigonometry Trigonometry Basics ; functions ; identities ; equations ; Solved problems about Trigonometry Other tutorials about the same subject trigbook (pdf) Triangles ; identities ; graphs ; inverse functions ; equations ; polar coordinates triangles (pdf) Many examples and exercises about triangles Formulas sheet (pdf) 4 pages Trig formulas Trigonometry (pdf) ratios ; functions ; identities ; equations ; examples ; solved problems

130. Sine Interactive tests and exercises. http://answermath.com/sin.htm

MENTAL MATH TUTORIALS Data Mining Neural Networks Fuzzy Logic MENU Home Addition Subtraction Multiplication ... ñol TUTORIALS Data Mining Neural Networks Fuzzy Logic and Sets Genetic Algorithms LABS Fuzzy Logic Artificial Life Sine: The trigonometric function that for an acute angle is the ratio between the leg opposite the angle when it is considered part of a right triangle and the hypotenuse. TEST A: Get a new angle B: a C: Solve this »» sin ( a ) D: Answer with Keyboard KEYBOARD D: Press Enter and View report REPORT Yours: Ours: Result: Time: Home Site Map Suggest a link Send Comments ... Help wgonz @ email.com - All Rights Reserved

131. Trigonometric Functions Sep 24, 2010 This chapter explains how the trig functions of sin, cos, tan, csc, sec and cot can be used to solve porblems. http://www.intmath.com/Trigonometric-functions/Trig-functions-intro.php

This is interactive mathematics where you learn math by playing with it! home sitemap LiveMath info Flash highlights ... feedback Chapter Contents Trigonometric Functions 1. Angles 3. Values of Trigonometric Functions 4. The Right Triangle and Applications 5. Signs of the Trigonometric Functions ... Comments, Questions? Follow IntMath on Twitter Get the Daily Math Tweet! IntMath on Twitter Recommendation Easy to understand trigonometry lessons on DVD. Try before you commit. More info: MathTutorDVD.com From the math blog... Friday math movie - Trigonometric Graphs Here's a light-hearted introduction to the concepts of trigonometric graphs.... IntMath Newsletter - Trigonometry tips and a puzzle 1. Earth Puzzle 2. Math tip - Trigonometry 3. From the math blog 4. Solution 5. Final thought - 3 kinds of people... Friday math movie - Trigonometric Strange Attractor Evolution This week's movie is a representation of a 5-dimensional space acted on by 5-D forces. IntMath Newsletter - Math exam preparation, periodic functions in the body In this Newsletter: 1. IntMath is on Twitter! 2. IntMath Poll Results - Math Exam Preparation 3. Math Tip - Study habits 4. Math Tip - Periodic functions and the body 5. From the Math Blog 6. Final Thought - Lonely, scared, bitter... IntMath Newsletter: Functions, Gini Coefficient, math anxiety

132. EMTeachline Mathematik Software Millionen Matheaufgaben in der Arithmetik, Algebra, Trigonometrie und hyperbolische Trigonometrie. Originale L sungsalgorithmen. Schrittweise Aufgabenl sungen und proben. Verwandte Vorstellungen. Proben von gebrauchten Formeln und Grundsaetzen. Einmalige Testm glichkeiten. http://www.emteachline.com/de/index_de.htm

133. Introduction To Trigonometric Functions - IES Inc. Introduction to Trigonometric Functions. Equalities and Inequalities. Further Trigonometric Functions. Triangles. http://www.ies.co.jp/math/products/trig/menu.html

Introduction to Trigonometric Functions Equalities and Inequalities Further Trigonometric Functions Triangles

134. Trig Cheat Sheet File Format PDF/Adobe Acrobat Quick View http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf

135. Trigonometric Functions The use of trigonometric functions arises from the early connection between mathematics and astronomy. Early work with spherical triangles was as important http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Trigonometric_functions.h

The trigonometric functions Analysis index History Topics Index Version for printing The use of trigonometric functions arises from the early connection between mathematics and astronomy. Early work with spherical triangles was as important as plane triangles. The first work on trigonometric functions related to chords of a circle. Given a circle of fixed radius, 60 units were often used in early calculations, then the problem was to find the length of the chord subtended by a given angle. For a circle of unit radius the length of the chord subtended by the angle x was 2sin ( x /2). The first known table of chords was produced by the Greek mathematician Hipparchus in about 140 BC. Although these tables have not survived, it is claimed that twelve books of tables of chords were written by Hipparchus . This makes Hipparchus the founder of trigonometry. The next Greek mathematician to produce a table of chords was Menelaus in about 100 AD. Menelaus worked in Rome producing six books of tables of chords which have been lost but his work on spherics has survived and is the earliest known work on spherical trigonometry. Menelaus proved a property of plane triangles and the corresponding spherical triangle property known the regula sex quantitatum.

136. Matematic Disctractiv Cu Sammy Sunt cuprinse formule i exerci ii din algebr , geometrie i trigonometrie, al turi de sec iune de matematic distractiv i competitiv . http://xmate.3x.ro/

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