Mark (√) against the correct answer in the following:
If ?
Given that
⇒ or
Since tan2x=sec2x-1, therefore
Hence, or
Let x=tanθ
⇒ θ=tan-1x
Hence,
Using , we get
Using -tan x = tan(-x), we get
=-2θ
=-2 tan-1 x
Differentiating with respect to x, we get