137 Use the appropriate compound angle formula in order to find the exact value for the ratio cos 12

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 16E
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Question
137
Use the appropriate compound angle formula in order to find the exact value for the ratio cos
12
-12
Angle a lies in quadrant 4 where sin a =
41
and angle b lies in quadrant 2 where cos b:
37
(a)
Determine cos a
(b)
Determine sin b
Transcribed Image Text:137 Use the appropriate compound angle formula in order to find the exact value for the ratio cos 12 -12 Angle a lies in quadrant 4 where sin a = 41 and angle b lies in quadrant 2 where cos b: 37 (a) Determine cos a (b) Determine sin b
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