Prove the identity 1 - tan x = Cos2x 1+ Cos2x (Need to work with two sides of the identity saparetly)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 22RE
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Prove the identity
1
-
tan x =
Cos2x
1+
Cos2x
(Need to work with two sides of
the identity saparetly)
Transcribed Image Text:Prove the identity 1 - tan x = Cos2x 1+ Cos2x (Need to work with two sides of the identity saparetly)
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