Mark (√) against the correct answer in each of the following:
To find: Value of
Formula used:
We have, … (i)
Let x = tanθ , ⇒ θ = tan-1x
⇒ dx = sec2θ dθ
If x = tanθ ,
Then 1 + x2 = sec2θ
⇒ θ = sec-1
Taking 1st function as and second function as