\[\int_{{}}^{{}}{{{\cos }^{5}}x\ dx=}\]

1.	\[\int_{{}}^{{}}{{{\cos }^{5}}x\ dx=}\]
A.	\[\sin x-\frac{2}{3}{{\sin }^{3}}x+\frac{1}{5}{{\sin }^{5}}x+c\]
B.	\[\sin x+\frac{2}{3}{{\sin }^{3}}x+\frac{1}{5}{{\sin }^{5}}x+c\]
C.	\[\sin x-\frac{2}{3}{{\sin }^{3}}x-\frac{1}{5}{{\sin }^{5}}x+c\]
D.	None of these
Answer» B. \[\sin x+\frac{2}{3}{{\sin }^{3}}x+\frac{1}{5}{{\sin }^{5}}x+c\]

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\[\int_{{}}^{{}}{{{\cos }^{5}}x\ dx=}\]

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