Math.acos()
Math.acos()
함수는 주어진 수의 아크코사인 값을 숫자(라디안)로 반환합니다. 즉,
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구문
Math.acos(x)
매개변수
x
- 각도를 나타내는 라디안.
반환 값
-1과 1 사이의 값이 주어진 경우, 그 값의 아크코사인. 아닐 경우 NaN
설명
The Math.acos()
method returns a numeric value between 0 and π radians for x
between -1 and 1. If the value of x
is outside this range, it returns NaN
.
Because acos()
is a static method of Math
, you always use it as Math.acos()
, rather than as a method of a Math
object you created (Math
is not a constructor).
예제
Using Math.acos()
Math.acos(-2); // NaN
Math.acos(-1); // 3.141592653589793
Math.acos(0); // 1.5707963267948966
Math.acos(0.5); // 1.0471975511965979
Math.acos(1); // 0
Math.acos(2); // NaN
For values less than -1 or greater than 1, Math.acos()
returns NaN
.
명세
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) The definition of 'Math.acos' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.acos' in that specification. |
Standard | |
ECMAScript (ECMA-262) The definition of 'Math.acos' in that specification. |
Living Standard |
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