Here's the question you clicked on:
msingh
if x= a tan^2 theta when x= 0, then theta=? and when x= a, then theta=?
when x= 0 \(0= a \tan^2 \theta \\ 0=\tan \theta\) for what value of theta is tan theta =0 ???
it means when x= 0, then theta=0
correct :) when x=a \(a= a \tan^2 \theta \\ 1=\tan \theta\) for what value of theta is tan theta =1 ???
yes, pi/4 is correct. is this problem related to integration ?
oh, then ok. otherwise, we have multiple values of theta when tan theta =0 or 1, but for integration purpose, what we did is sufficient.