Find the value of:

$\tan \left(-330°\right)$

$\sin 105°+\cos 105°$

$\sin 300°cosec1050°-\tan \left(-120°\right)$

Evaluate the following:

$\sin 690°\cos 930°+\tan \left(-765°\right)cosec\left(-1170°\right)$

${\cot }^2\frac{\pi }{6}+\mathrm{cosec}\frac{5\pi }{6}+3{\tan }^2\frac{\pi }{6}$

$3\sin \frac{\pi }{6}\sec \frac{\pi }{3}-4\sin \frac{5\pi }{6}\cot \frac{\pi }{4}$