Cosine Calculator

Calculate the cosine of a number

The calculator will find the cosine of the given value in radians or degrees.

The domain of the cosine is $x\in \mathbb{R}$ , the range is $[-1,1]$ .

It is an even function.

Find $\cos{\left(\frac{\pi}{6} \right)}$ .

$\cos{\left(\frac{\pi}{6} \right)} = \cos{\left(30^{\circ} \right)} = \frac{\sqrt{3}}{2}\approx 0.866025403784439$ A

For graph, see the graphing calculator.