Fourier transforms. help!!! hey! i am in high school, working on a project on discrete fourier transforms.. I have the formula: X(k)= EN-1n=0x(n)(cos(wnk)-isin(wnk)) where w=2pi/N. My question is: how do you express x(n)?does it have an equation, or what? I really need help with this, so please if anyone knows.." THANK YOU!