Indefinite integral Definition and 207 Threads

How do I find the indefinite integral of 1/[(e^x)+(e^-x)] ? Do I have to multiply by [(e^x)-(e^-x)]/[(e^x)-(e^-x)] to eliminate the denominator? !

I am just curious I was thinking about this and if anyone could explain I would appreciate it. I am curious to know how to find the indefinite integral of xsinx with respect to x. Thanks, David

\int sin(9x)sin(16x)dx is there another way of solving the problem above besides using the multiple angles formula?

Hi there, Can someone explain to me what the following are and how each one is used as a tool for the next one: 1)Indefinite integral 2)Riemann Sum 3)Definite Integral 4)Fundamental Theorem of Calculus(The part which says that the derivative of the integral of f(t)dt from a to x is...

I've been trying to integrate the following function but have gotten somewhat stuck doing it. The answer i managed to produce gave some bogan answers. the integral in question is \int e^\frac{-(x-\mu)^2}{(2\sigma)^2} where \mu and \sigma are constants. its part of the normal...

Hi! I am stuck with this integration problem: Thanks in advance.

\int sin(7x)sin(13x)dx i just need to know how to start this, i can't use u-du... i can't borrow anything... so how would i start this?