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









1