Hello there!

I need help on solving the following equation.

∫ (π+t) cos (nt) dt + ∫ (π-t) cos (nt) dt

I don't know if its clear but its like this "Integral of [(pi + t) into cos (nt)] dt + integral of [(pi - t) into cos (nt)] dt."

I don't know how to continue after I expand each!!!

Any help is much appreciated.

Thanks,

atwinix