Berapa hasil dar integral cos pangkat 7 x sin x dx

Mater Integral
Misalkan u = cos x => du = -sin x dx
[tex] \int \cos^7 x \sin x dx \\ = - \int u^7 du = -\frac{1}{8}u^8 + C \\ = -\frac{1}{8}\cos^8 x + C [/tex]