Question

Question: All of the following trigonometric functions have the same value except

Answer 1

Answer:

$\tan{90^{\circ}}$

Step-by-step explanation:

Because $\cos{x}$ and $\sin{x}$ are defined for all $x$(i.e. their domain is $(-\infty, \infty)$), so they can never be undefined. However, $\tan{90}=\sin{90}/\cos{90}=\sin{90}/0$, which is undefined, because you can't divide by $0$. So, the answer is $\boxed{\tan{90^{\circ}}}$