Answer
(a) $0$
(b) $-1$
(c) $0$
Work Step by Step
You are given that $s=\pi$.
(a) $\sin(s)=\sin(\pi)$
The angle $\pi$ intersects the unit circle at $(-1, 0)$, and since $sine$ gives the y-coordinate, the value of $\sin(\pi)$ is $0$.
(b) $\cos(s)=\cos(\pi)$
The angle $\pi$ intersects the unit circle at $(-1, 0)$, and since $cosine$ gives the x-coordinate, the value of $\cos(\pi)$ is $-1$.
(c) $\tan(s)=\tan(\pi)$
The angle $\pi$ intersects the unit circle at $(-1, 0)$, and since $tangent$ gives $\frac{y}{x}$, the value of $\tan(\pi)$ is $\frac{0}{-1}$, which simplifies to $0$.
