\[\int_{{}}^{{}}{{{\left( \cos \frac{x}{2}-\sin \frac{x}{2} \right)}^{2}}dx=}\]

\[2{{\cos }^{2}}\frac{x}{2}+c\]

\[\frac{1}{3}{{\left( \cos \frac{x}{2}-\frac{x}{2} \right)}^{3}}+c\]

\[\int_{{}}^{{}}{{{\left( \cos \frac{x}{2}-\sin \frac{x}{2} \right)}^{

1.	\[\int_{{}}^{{}}{{{\left( \cos \frac{x}{2}-\sin \frac{x}{2} \right)}^{2}}dx=}\]
A.	\[x+\cos x+c\]
B.	\[2{{\cos }^{2}}\frac{x}{2}+c\]
C.	\[\frac{1}{3}{{\left( \cos \frac{x}{2}-\frac{x}{2} \right)}^{3}}+c\]
D.	\[x-\cos x+c\]
Answer» B. \[2{{\cos }^{2}}\frac{x}{2}+c\]

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\[\int_{{}}^{{}}{{{\left( \cos \frac{x}{2}-\sin \frac{x}{2} \right)}^{2}}dx=}\]

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