The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated
trigonometric function at t.
-$\sin \frac { 3 \pi } { 2 }$
A) $- 1$
B) 1
C) 0
D) undefined

Question

Quizplus · Accepted Answer

The sine of an angle in the unit circle is equal to the y-coordinate of the corresponding point. For $\frac{3\pi}{2}$, the point on the unit circle is (0, -1), so $\sin \frac{3\pi}{2} = -1$.

The Point P(x, Y) on the Unit Circle That Corresponds sin⁡3π2\sin \frac { 3 \pi } { 2 }sin23π​

The Point P(x, Y) on the Unit Circle That Corresponds $\sin \frac { 3 \pi } { 2 }$