Question

Which expression is equivalent to cos120°?

Answer 1

Answer:

$-(\frac{1}{2})$

Step-by-step explanation:

The given expression is:

$cos120^{\circ}$

This expression can be rewritten as:

=$cos(180-60)^{\circ}$

=$-cos60^{\circ}$

=$-(\frac{1}{2})$ (Because the value of $cos60^{\circ}$ is $\frac{1}{2}$)

which is the required simplified expression.

Answer 2

The number or expression is -0.5