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Find dy/dx ,if y=cos-1 (x-x-1 /x+x-1)?
y=cos-1 (x-x-1 /x+x-1)
= cos-1 (x2 -1 /x2 +1)
Θ =tan-1 x
Y= cos-1 (tan2 θ -1/ tan2 θ +1)
= cos-1 (1-tan2 θ/ tan2 θ +1)
= cos-1 (-cos2θ)
= cos-1 (cos π-2θ)
=π- 2 tan-1 x
dy/dx = 0- 2/1+x2
By: bhavesh kumar singh ProfileResourcesReport error
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