# Solution: Evaluate the double integral of r sin u dr du

Evaluate the double integral of r sin u dr du, the limits of r is 0 and cos u and the limit of u are 0 and pi. How to find the double integral of trigonometric function?

#### Problem Statement: EE Board April 1997

Evaluate the double integral of r sin u dr du, the limits of r is 0 and cos u and the limit of u are 0 and pi.

The double integral of the trigonometric function with the given limit is 1/3.

Solution: