# Definite integral

ainster31

## The Attempt at a Solution

R136a1
Could you write some sentences too? You just posted a bunch of equations. So, could you tell us exactly the statement that needs to be proven. Tell us in words what you did. Tell us exactly where you are stuck.

ainster31
Could you write some sentences too? You just posted a bunch of equations. So, could you tell us exactly the statement that needs to be proven. Tell us in words what you did. Tell us exactly where you are stuck.

bn needs to be computed. The solution is under 1.

I computed bn and the end result is under 3. The issue is that my end result doesn't match the solution's end result.

Staff Emeritus
$$\frac{2}{n\pi} \cos\left( \frac{n\pi}{2} \right)$$
$$\frac{2}{n\pi} \cos\left( \frac{n\pi}{2} \right)$$