4.2.39 Question Help Find the exact value of the given trigonometric function. Do not use a calculator. 97T COs 9T COs 4 (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
4.2.39 Question Help Find the exact value of the given trigonometric function. Do not use a calculator. 97T COs 9T COs 4 (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.1: Verifying Trigonometric Identities
Problem 75E
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Find the exact value of the given trigonometric
cos 9pie
______________
4
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