pre-calc sect. 4.3 - Section 4.3 Right Triangle...

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Unformatted text preview: Section 4.3 Right Triangle Trigonometry We can construct a right triangle by dropping a line segment from point P on the unit circle perpendicular to the x-axis. It is helpful to interpret trigonometric functions in terms of right triangles for certain kinds of problems. Right Triangle Definitions of Trigonometric Functions c a hypotenuse of length angle opposite side of length = = sin c b hypotenuse of length angle to adjacent side of length = = cos b a angle to adjacent side of length angle opposite side of length = = tan a c angle opposite side of length hypotenuse of length = = csc b c angle to adjacent side of length hypotenuse of length = = sec a b opposite side of length angle to adjacent side of length = = cot Trigonometric function values of depend only on the size of angle and not on the size of the triangle. EX 1: Use the Pythagorean Theorem to find the length of the missing side of each triangle. Then find the value of each of the six trigonometric functions at ....
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This note was uploaded on 11/23/2010 for the course MATH 115 taught by Professor Mcbride,v during the Fall '08 term at University of South Dakota.

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pre-calc sect. 4.3 - Section 4.3 Right Triangle...

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