indefinite-integration

Question: $\int_{{}}^{{}}{{{\sin }^{5}}x{{\cos }^{4}}x\ dx=}$

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

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

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

4) None of these

Solution:

Explanation: No Explanation

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