## msingh Group Title if x= a tan^2 theta when x= 0, then theta=? and when x= a, then theta=? one year ago one year ago

1. hartnn

when x= 0 $$0= a \tan^2 \theta \\ 0=\tan \theta$$ for what value of theta is tan theta =0 ???

2. msingh

it means when x= 0, then theta=0

3. hartnn

correct :) when x=a $$a= a \tan^2 \theta \\ 1=\tan \theta$$ for what value of theta is tan theta =1 ???

4. msingh

pi/4

5. hartnn

yes, pi/4 is correct. is this problem related to integration ?

6. msingh

yup

7. hartnn

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.