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Prove that sin^-1 (2x√1-x^2=2cos^-1 x

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Prove that sin^-1 (2x√1-x^2=2cos^-1 x

Posted by Phira Pala 1 year, 3 months ago

CBSE > Class 12 > Mathematics

2 answers

Piyush Kumar . 1 year, 2 months ago

Let x=cost then t= cos^-1x and by putting x=cost we get sin^-1(2sint•cost)=sin-1(sint2t)=2t and t=cos^-1x so 2cos^-1x hence proved

M.V.Priya Shree Priya Shree 1 year, 3 months ago

Y=cos2x sin3x.cos4x sin5x,find dy/dx.

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