$\int_{{}}^{{}}{\cos x\sqrt{4-{{\sin }^{2}}x}}\ dx=$

Question

Accepted Answer

$\frac{1}{2}\sin x\sqrt{4-{{\sin }^{2}}x}+2{{\sin }^{-1}}\left( \frac{1}{2}\sin x \right)+c$

Answer

$\frac{1}{2}\sin x\sqrt{4-{{\sin }^{2}}x}-2{{\sin }^{-1}}\left( \frac{1}{2}\sin x \right)+c$

Answer

$\frac{1}{2}\sin x\sqrt{4-{{\sin }^{2}}x}+{{\sin }^{-1}}\left( \frac{1}{2}\sin x \right)+c$

Answer

None of these

indefinite-integration