$\tan \left(A + B \right) = \_\_\_\_\_\_\_.$

${\tan }^{-1 }\left(\frac{2}{11}\right) + {\tan }^{-1 }\left(\frac{7}{24}\right) = \_\_\_\_\_\_\_.$

The principal period of $\sin 2x = \_\_\_\_\_\_\_.$

$2 \sin \left(\frac{5\pi }{12}\right) \cos \left(\frac{7\pi }{12}\right) = \_\_\_\_\_\_\_\_.$

$\cos \left(\pi + {\cos }^{-1} \left(\frac{3}{5}\right)\right) = \_\_\_\_\_\_\_\_\_.$

The principal period of $\tan \theta = \_\_\_\_\_.$

$cot \left(225°\right) = \_\_\_\_\_\_\_.$

${60}^{°}$ = ____________ radian.

Period of $\sin \theta$ is $\_\_\_\_\_\_\_.$

$\sin \left(\frac{\pi }{2}+\theta \right) = \_\_\_\_\_\_\_.$