posted by david .
d/dx integral from o to x of function cos(2*pi*x) du is
first i do the integral and i find the derivative right.
by the fundamental theorem of calculus, if there is an integral from o to x, don't i just plug the x in the function.
the integral of the problem is cos*2*pi*) is just cos(2*pi*x) right or is that wrong. then i find the derivative.
I'm not sure. I think it's sin(2pi), but you can check out calc101 (google it) for help..?