$$$\cos{\left(120^{\circ} \right)}$$$

The calculator will find the cosine of $$$120$$$ degrees.

Find $$$\cos{\left(120^{\circ} \right)}$$$.

$$$\cos{\left(120^{\circ} \right)} = \cos{\left(\frac{2 \pi}{3} \right)} = - \frac{1}{2} = -0.5$$$A

For graph, see the graphing calculator.