<acos>
A trigonometric function that calculates the arccosine of a number. It's used in advanced CSS math for calculating angles in layouts or animations based on side lengths.
Quick example
.element {
/* Calculates an angle based on a ratio */
transform: rotate(calc(acos(0.5)));
}<acos> Browser Support
Widely available Since 2023 92% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2023.
Safe to use without fallbacks.
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