Verify: cos? x tan? x-1 1. = -1 %3D cos2 x

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 18RE
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Question
Closure
Verify:
cos? x tan? x- 1
1.
= -1
cos? x
Transcribed Image Text:Closure Verify: cos? x tan? x- 1 1. = -1 cos? x
Expert Solution
Step 1

To verify:

cos2xtan2x-1cos2x=-1

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