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Prove the identity 

 

sin2x/1-cos2x = cotx

Guest May 26, 2017
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sin2x  / [ 1 - cos 2x ]  =   cot x

 

[2 sinx cos x ] / [ 1 - (1 - 2sin^2x) ]

 

[ 2 sinx cosx ]  /  [ 2sin^2 x]

 

{2 cos x ]  /  [ 2 sin x ]

 

cos x  / sin x              =       cot x

 

 

cool cool cool

CPhill  May 26, 2017

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