Question

What trigonometric ratios of angles from $0^{\circ }$ to ${90}^{\circ }$ are equal to $0$?

Answer 1

The trigonometric table of all the functions with all values are shown in the above table:

Hence, from the given table we observe that between $0^o$ to ${90}^o$, the below trigonometric functions are equal to $0$.

$\sin 0^o=\tan 0^o=\cos \frac{\pi }{2}=\cot \frac{\pi }{2}=0$