Prove the following identities.         ( 1+ sin theta ) ( 1 - sin theta  ) = cos 2 theta

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter5: Identities And Formulas
Section5.3: Double-angle Formulas
Problem 56PS: Prove each of the following identities. csc2sin=cos2sin
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Prove the following identities.

 

 

 

 

( 1+ sin theta ) ( 1 - sin theta  ) = cos 2 theta 

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