Trigonometry 1 TOP TEN WEBSITES www.themathpage.com/atrig/trigonometry #1 oolong.co.uk/trig #2 mathworld.wolfram.com/Trigonometry #3 SOHCAHTOA was an Native American women who suposedly discovered trigonometry and pythagorean theroem in nature, but no one really knows for sure if she did. x TrIGONOMETRY H O A The cool thing is that the three parts of her name are the symblols for the three parts of trigonometry; Sine, Cosine, and Tangent. SOH stands for Sine=Opposite/Hypotenuse CAH stands for

Cosine=Adjacent/Hypotenuse TOA stands for Tangent=Opposite/Hypotenuse Trigonometry is a way to find either a missing angle or side of a triangle using the measurments of the sides or angles that we already know. Trig can only be done in right triangles. The four parts needed are an angle, the opposite side of the angle, the adjacent side of the angle and the hypotenuse. However, in order to perform a trigonometry equation, you need at least 2 of the 4 parts. When finding a side, the eqaution will be Sine(x)=O/H, Cosine(x)=A/H, or Tangent(x)=O/A. To work the equation, you will plug in the angle (x) and either A,O, or H depending on what you are given and what the equation is. Then you solve. When finding an angle, the equation will be Sine^-1(O/H)=x, etc. To work the equation you will plug in A, O, or H depending on the equation and what you are given. Then you solve. www.sosmath.com/trig #4 www.hyper-ad.com #5 tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet #6 www.ndt-ed.org/EducationResources #7 www.mathsisfun.com/algebra/trigonometry #8 www.math10.com/en/algebra/sin-cos-tan #9 www-groups.dcs.st-and.ac.uk/~history/HistTopics/Trigonometric_functions #10 LIFE EXAMPLE Lets say one day you are in your back yard and you want to know how high up your tree house is. You know that you are 50 feet away from the base of the tree and the angle elevation from you to the top of the tree is 35 degrees. How high up is your tree house? First you need to draw a picture. You have too draw a triangle and label all the parts like the one shown. Then, you have to decide what equation to use. In this case, it would be tan(35)=O/50. You then plug in the numbers on the calculator to get the answer. 50ft O 35 deg. You Tree House Answer: 35.01 ft

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# Trigonometry Prezi

My 6 part prezi describing Tigonometery and its parts.

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