Hello, Chuzzle!

I have been asked to find the definite integral, as described above, of a product of e, with a variable exponent,

and a trigonometric function. .An example would be: .

Evidently, you have not been shown the procedure for this type of problem.

We have: .

By parts: .

Then: .

This integral is as "bad" as the original integral, but watch this!

By parts again: .

We have: . .

. . . . . . . . .

. . . . . . . . .

. . . . . . . .

Therefore: .