sin? x 1- 1-cos x =-COS X

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 40E
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Question
sin
14.1-
:- COS X
- COS X
Transcribed Image Text:sin 14.1- :- COS X - COS X
Expert Solution
Basic information

Here we have to use the basic trigonometric identity

sin2θ+cos2θ =1

and we know that 

a2-b2= (a+b)(a-b)

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