cos\theta =(1)/(3)and \theta  is in quadrant IV, then cos(\theta )/(2)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 81E
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cos\theta =(1)/(3)and \theta  is in quadrant IV, then cos(\theta )/(2)

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