Evaluate sin(120)

$\sin (120)$

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$\sin (60)$

The exact value of $\sin (60)$ is $\frac{\sqrt{3}}{2}$ .

$\frac{\sqrt{3}}{2}$

The result can be shown in multiple forms.

Exact Form:

$\frac{\sqrt{3}}{2}$

Decimal Form:

$0.86602540 \dots$