Question

What is the exact value of sin(–210°)?

A) $-\sqrt{3}/2$
B) $-1/2$
C) $\sqrt{3}/2$
D) $1/2$

Answer 1

The exact value of sin(-210°) is -1/2.

Step-by-step explanation:

To find the exact value of sin(-210°), we can use the unit circle. In the unit circle, -210° is in the third quadrant. The sine function is negative in the third quadrant. The exact value of sin(-210°) is -1/2 (option B).