Trigonometry is a branch of Mathematics that studies triangles and the relationships between their sides and the angles between these sides. www.wikipedia.org/wiki/Trigonometry , August 30 2012 last modified, The public Bartholemaeus Pitiscus published an influential work on Trigonometry but it did not reach its modern form till the 17th century during the Age of Enlightenment with Leonhard Euler. www.wikipedia.org/wiki/History_of_Trigonometry ,August 22 2012 last modified, The public Bartholemaeus Pitiscus was a German astronomer and theologian. He first coined the word Trigonometry. He achieved fame with his influential work called Trigonometria which introduced the word Trigonometry to English and French languages. Some people believe that he started using the decimal point. Leonard Euler introduced the concept of functions and was the first to write f(x), he introduced the modern notation for the trigometric functions. www.wikipedia.org/wiki/History_of_Trigonometry , August 22, 2012 last modied, The public Surveyors use the tangent function. They can use trigonometry to find the distance across a river. Advanced scanning procedure use sine and cosine functions find applications in medical techniques such as MRI scanning, in detecting tumors and even in laser treatments. Sound travels in waves and this pattern though not as regular as a sine or cosine functions, functions are still useful in development of computer music. A computer does not listen to and comprehend music as we do, so computers represent it mathematically by its consistent sound waves. This means that sound engineers research advances in computer music have to relate to the basic law of Trigonometry. Flight Navigators use the simplest application computing the heading to a nearby destination with known coordinates. www.mathworkscenter.com/mathtips/trigonometry .com Sine- opposite/hypotenuse Cosine- adjacent/hypotenuse Tangent- opposite/adjacent Cotangent- adjacent/opposite Secant- hypotenuse/adjacent Cosecant- hypotenuse/opposite They all deal with adjacent, opposite, and hypotenuse of a triangle. I remember using this in geometry. www.wikipedia.org/wiki/Trigonometric_functions , September 2 2012 Last modified, The public www.trigonometry-help.net This site explains basic Trigonometry It offers tutors The class can make food like cakes and cookies and decorate them to look like the unit circle. A unit circle is a circle with a radius of one. The unit circle is the circle of radius one centered at the origin. If (x,y) is point on the unit circle in the first quadrant then x and y are the lengths of the legs of a right triangle whose hypotenuse is set equal to one. www.wikipedia.org/wiki/unit_circle , August 3 2012 last modified, The public

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# Trigonometry Project