2 integral x sin x dx

Integral Parsial

∫ x sin x dx
..
cara langsung
= (x)(-cos x) - (1)(-sin x) + c
= - x cos x + sin x + c

cara parsial
u = x --> du =  dx
dv =  sin x --> v = -cos x 

∫u dv = u v - ∫ v du
∫ x sin x dx = x (-cos x) - ∫ - cos x dx
∫ x sin x dx = -x cos x + sin x + c