Integration by Parts
1. Using the formula: uv - o` v du. With this formula, substitute for dv the most complicated term that can be integrated.
ex.
ò x cos x dx
substitute:
dv = cos x u = x v = sin x du = dx uv - ò v du
x sin x - ò sin x dx
x sin x - ( -cos x ) + C
x sin x + cos x + C