Find the exact value of each of the remaining trigonometric functions of $\theta$.
\[
\sin \theta=1
\]
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. $\cos \theta=$
(Simplify yơr answer, including any radicals. Use integers or fractions for any numbers in the expression.)
B. The function is undefined.

Answer

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Answer

Final Answer: $\boxed{0}$

Steps

Step 1 ：Given that $\sin \theta = 1$, we know that $\theta$ is equal to $\frac{\pi}{2}$ or $90^{\circ}$ in the unit circle.

Step 2 ：The cosine of $\frac{\pi}{2}$ is 0.

Step 3 ：Therefore, $\cos \theta = 0$.

Step 4 ：Final Answer: $\boxed{0}$