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Trigonometry (called "trig" for short) (from Greek trigōnon "triangle" + metron "measure") is a branch of mathematics that deals with triangles, particularly those plane triangles in which one angle has 90 degrees (right triangles). Trigonometry deals with relationships between the sides and the angles of triangles and with the trigonometric functions, which describe those relationships. Trigonometry has applications in both pure mathematics and in applied mathematics, where it is essential in many branches of science and technology. It is usually taught in secondary schools either as a separate course or as part of a precalculus course. Trigonometry is informally called "trig". A branch of trigonometry, called spherical trigonometry, studies triangles on spheres, and is important in astronomy and navigation. From Wikipedia under the
GNU Free Documentation License  pyracantha.com 511px x 389px | 105.50kB [source page] doing it on the computer wouldn t be as effective I have done pages on polynomials on conic sections on formulas for describing acceleration and on trigonometry Here is an image of my latest page showing the formula for the trajectory of a projectile fired at an angle The arrangement is mine but the sequence of information comes from one of my trigonometry books I keep  vojousoftware.com 497px x 576px | 27.00kB [source page] attime jpg 13 Nov 2003 06 52 35K iNotePad jpg 25 May 2002 00 56 32K trigonometry jpg 16 Jan 2005 07 52 27K xfi large jpg 25 May 2002 00 56 23K From Yahoo Image Search: "Trigonometry"  junior-disco.livejournal.com junior_disco Sat, 31 Oct 2009 10:51:35 GM IT'S halloween y'ALL!!!1!!  ebook30.com Ebook30.com Mon, 28 Sep 2009 13:18:03 GM EAN 133277 ebook playboy magazine, penthouse. Find your links in rapidshare, megaupload, ifile, torrent.  scrapeveryone.com scrapeveryone ue, 03 Nov 2009 19:56:00 GM Rajnikant . Trigonometry. in Physics. . From Google Blog Search: "Trigonometry"  news.google.com FHSU News and Current Events The students will be tested in six areas of math: trigonometry , algebra, geometry, applications, number sense and using a calculator. ... news.google.com Annapolis Capital Among them are "Calculus with Analytic Geometry," "Plane Trigonometry " and "Modern Technical Mathematics." A handsome table sits at the rear of the room. ... news.google.com Blackanthem.com ... was a scholar in the House of Wisdom in Baghdad and is also recognized for his contributions in the fields of astronomy, geography and trigonometry . ... From Google News Search: "Trigonometry" What is the correct version of the following Trigonometry formula? Q. In Trigonometry there is a formula that reads: CosA - CosB = -2Sin((A+B)/2)Sin((A-B)/2 ). Unfortunately, I have two different textbooks that show this formula differently. Also, when I look it up on-line, several websites quote the formula differently as well! One variation, for example, is: CosA - CosB = -2Sin((A+B)/2)Cos((A-B)/2 ). Are all of these formulae interchangable, or is one of them correct and the rest incorrect? Thanks! Asked by tangoprince - Wed Feb 28 13:54:43 2007 - - 5 Answers - 0 Comments A. My handbook has: cosA - cosB = -2sin( (1/2)(A+B)) sin((1/2)(A-B)) You can check the textbooks by trying a few values. For example, try A= B = 45 degrees. The second formula in your question becomes: CosA - CosA = 0 = -2Sin(A) But ... this is not correct in general (it is correct only if A = 0, 180 degrees, 360 degrees, ...). So the second formula can not be correct for all angles. Are you sure you got all the parenthesis correct? Answered by morningfoxnorth - Wed Feb 28 14:09:18 2007 What trigonometry textbook did you use to home school your highschooler? Q. This year my home schooled 10th grader has to take trigonometry. What trigonometry course/text did you use? Good trigonometry textbooks have been harder to find than other subjects - recommendations, past experience, help? Please and thank you! Asked by Kindle - Tue Aug 5 11:45:46 2008 - - 3 Answers - 0 Comments A. My kids used They offer a one month free trial for homeschoolers. My nephew went up through Trig. My son just finished Algebra 2. He was well prepared to take the placement test at the junior college; placing into all transferable courses. Best of Luck to you! jana Answered by jana - Tue Aug 5 19:21:37 2008 What does math through trigonometry mean?
Q. Colleges are always saying that for required courses in math you need to take math through trigonometry...what does that mean? Asked by wallflower - Sat Oct 18 18:24:40 2008 - - 3 Answers - 0 Comments A. That means Algebra I, geometry, algebra II and trig. Answered by jenh42002 - Sat Oct 18 18:28:18 2008 From Yahoo Answer Search: "Trigonometry"
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Dave's Short Trig course
Trigonometry Angle Calculator
Trigonometry