indefinite-integration

Question: $\int_{{}}^{{}}{{{\left( \cos \frac{x}{2}-\sin \frac{x}{2} \right)}^{2}}dx=}$

1) $x+\cos x+c$

2) $2{{\cos }^{2}}\frac{x}{2}+c$

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

4) $x-\cos x+c$

Solution:

Explanation: No Explanation

Fundamental integration

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