Math.acos

acos — Returns the arc-cosine (in radians) of a number.

Description

Math.acos(number number)

Parameters

Examples

Example #1 – acos example

Run
console.log(Math.acos(0.5));   // 1.0471975511965979
console.log(Math.acos(4));     // NaN
console.log(Math.acos(1));     // 0
console.log(Math.acos(-1));    // 3.141592653589793
console.log(Math.acos(0));     // 1.5707963267948966

External references

• Mozilla: Math.acos method