integral x^2 cos 2x dx

InTegraL
>> Parsial

turunan.....integral
x²...................cos 2x
2x..................1/2 sin 2x
2....................-1/4 cos 2x
0....................-1/8 sin 2x

∫x² cos 2x dx
= x²(1/2 sin 2x) - 2x(-1/4 cos 2x) + 2(-1/8 sin 2x) + C
= 1/2 x² sin 2x + 1/2 x cos 2x - 1/4 sin 2x + C