# Help please? Integral question below. Don’t really understand the concept of integrals in general. Thanks!

##### 1 Answer

Dec 8, 2017

This is a question involving the Fundamental Theorem of Calculus.

#### Explanation:

For

Now we want

Again, using FTC part 1, this time with the chain rule as well, we get:

# = sqrt(1+sin^2y) cosy#

At

# = sqrt(1+1/4) (sqrt3/2) = sqrt15/4#