Mathematics

Problem

\int \sin^5 x\,\cos^4 x\,dx =

(a)

-\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x-\frac{1}{9}\cos^9 x+c

(b)

\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x-\frac{1}{9}\cos^9 x+c

(c)

\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x+\frac{1}{9}\cos^9 x+c

(d) None of these (a)

-\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x-\frac{1}{9}\cos^9 x+c

(b)

\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x-\frac{1}{9}\cos^9 x+c

(c)

\frac{1}{5}\cos^5 x+\frac{2}{7}\cos^7 x+\frac{1}{9}\cos^9 x+c

(d) None of these