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Prove the Identity sin2x / 1-cos2x=cotx

 Feb 5, 2019
 #1
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 sin2x / [1-cos2x ]  =  cotx           work with the left side

 

sin 2x  /  [ 1 - (1 - 2sin ^2 x ) ]  

 

sin 2x / [ 2 sin^2 x ] [ 2sin x cosx] / [ 2 sin ^2 x ]

 

sin x cos x  / [ sin ^2 x]

 

sin x cos x / [ sin x * sin x ] =

 

cos x / sin x      =

 

cot x

 

 

cool cool cool

 Feb 5, 2019

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