Question
Thu March 15, 2012 By:

Please differentiate the following:

Expert Reply
Fri March 16, 2012
Let 2x = tanA
So , the equation becomes
cos-1( 2.tanA / (1+tan2A) ) = cos-1(sin2A) = pie/2 - sin-1(sin2A) = pie/2 - 2A = pie - 2tan-12x
the derivative of the above function is
{-2/(1+4x)} .2x log2 
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