Prove that <span

Given:

Re - writing the given equation in the form of tan ^{– 1}, we get,

Formula:

Formula:

Hence, proved.

OR

Given:

Re - writing the given equation as,

Taking, tan^-1x = m…..(1)

tan m = x

Now, drawing the right-angled triangle for this condition we get,

Formula:

Therefore,

And thus,

m

Therefore, we get,