Inverse Cosine Calculator
Calculate the inverse cosine of a number
The calculator will find the inverse cosine of the given value in radians and degrees.
The inverse cosine $$$y=\cos^{-1}(x)$$$ or $$$y=\operatorname{acos}(x)$$$ or $$$y=\operatorname{arccos}(x)$$$ is such a function that $$$\cos(y)=x$$$.
The domain of the inverse cosine is $$$[-1,1]$$$, the range is $$$[0,\pi]$$$.
It is an even function.
Related calculator: Cosine Calculator
Your Input
Find $$$\operatorname{acos}{\left(\frac{1}{2} \right)}$$$.
Answer
$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = \frac{\pi}{3}\approx 1.047197551196598$$$A
$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = 60^{\circ}$$$A
For graph, see the graphing calculator.