I) Principal value of `cos theta =-1` is `pi` II) Principal value of `sin theta = 0` is `pi` Which of the above statement is correct?

If sin theta=-1, then the principal value of theta is

The principal value of (theta+(pi)/(4)) where value of sin theta+cos theta=1 is

If sin^2theta-cos^2theta=1 then find the principal value of theta

The principal values of cos^(-1)(-sin(7pi)/(6)) is

The principal values of cos^(-1)(-sin(7pi)/(6)) is

The principal values of cos^(-1)(-sin((7pi)/6)) is

Statement-I: The area bounded by x=2 cos theta,y=3sin theta is 36pi sq. units. Statement-II : The area bounded by x=2cos theta, y=2 sin theta is 4pi sq. units. Which of the above statement is correct.

Statement-I: The area bounded by x=2 cos theta,y=3sin theta is 36pi sq. units. Statement-II : The area bounded by x=2cos theta, y=2 sin theta is 4pi sq. units. Which of the above statement is correct.

Find the principal value of (1+cos^2theta)sin^2theta=1