(a) If 0 is in standard position, then the reference angle 0 is the acute angle formed by the terminal side of e and the ---Select--- E. So the reference angle for e = 120° is e = and that for 0 = 190° is 0 = (b) If e is any angle, the value of a trigonometric function of 0 is the same, except possibly for sign, as the value of the trigonometric function of 0. So sin(120°) = sin and sin(190°) = -sin
(a) If 0 is in standard position, then the reference angle 0 is the acute angle formed by the terminal side of e and the ---Select--- E. So the reference angle for e = 120° is e = and that for 0 = 190° is 0 = (b) If e is any angle, the value of a trigonometric function of 0 is the same, except possibly for sign, as the value of the trigonometric function of 0. So sin(120°) = sin and sin(190°) = -sin
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 92E
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