Precalculus Examples

$\sin (- \frac{π}{3})$

Step 1

Find the value using the definition of sine.

$\sin (- \frac{π}{3}) = \frac{opposite}{hypotenuse}$

Step 2

Substitute the values into the definition.

$\sin (- \frac{π}{3}) = \frac{- \frac{\sqrt{3}}{2}}{1}$

Step 3

Divide $- \frac{\sqrt{3}}{2}$ by $1$ .

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

Step 4

The result can be shown in multiple forms.

Exact Form:

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

Decimal Form:

$- 0.86602540 \dots$

Step 5