If $A + C = B,$ then $\tan A\,\tan B\,\tan C = $
$\tan A\,\tan B + \tan \,C$
$\tan \,B - \tan \,C - \tan \,A$
$\tan A + \tan C - \tan B$
$ - \,(\tan A\tan B + \tan C)$
Find the degree measures corresponding to the following radian measures (Use $\pi=\frac{22}{7}$ ).
$\frac{5 \pi}{3}$
Find the value of $\cos \left(-1710^{\circ}\right)$.
Find the value of the trigonometric function $\cot \left(-\frac{15 \pi}{4}\right)$
Find the degree measure of the angle subtended at the centre of a circle of radius $100 \,cm$ by an arc of length $22\, cm$ ( Use $\pi=\frac{22}{7}$ ).
Find $\sin \frac{x}{2}, \cos \frac{x}{2}$ and $\tan \frac{x}{2},$ if $\tan x=\frac{-4}{3}, x$ in quadrant $II$