Prove the following identities. cos( - ) sin x/2

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 28E
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Prove the following identities.
cos( - )V
sin x/2
sin x
sec x/2
Transcribed Image Text:Prove the following identities. cos( - )V sin x/2 sin x sec x/2
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