∫sin(xdx)等于多少?

问题描述:

∫sin(xdx)等于多少?

∫(sinx)^3dx =∫(sinx)^2*sinxdx = -∫sin^2xd(cosx) = -∫(1-cos^2x)d(cosx) = -cosx+1/3*(cosx)^3+C