This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
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 xaxis. 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 ....
View
Full
Document
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.
 Fall '08
 Mcbride,V
 Angles, Unit Circle

Click to edit the document details