Math.acos()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itโs been available across browsers since โจ2015๋ 7์โฉ.
Math.acos() ํจ์๋ ์ฃผ์ด์ง ์์ ์ํฌ์ฝ์ฌ์ธ ๊ฐ์ ์ซ์(๋ผ๋์)๋ก ๋ฐํํฉ๋๋ค. ์ฆ,
์๋ํด ๋ณด๊ธฐ
// Calculates angle of a right-angle triangle in radians
function calcAngle(adjacent, hypotenuse) {
return Math.acos(adjacent / hypotenuse);
}
console.log(calcAngle(8, 10));
// Expected output: 0.6435011087932843
console.log(calcAngle(5, 3));
// Expected output: NaN
๊ตฌ๋ฌธ
Math.acos(x);
๋งค๊ฐ๋ณ์
x-
๊ฐ๋๋ฅผ ๋ํ๋ด๋ ๋ผ๋์.
๋ฐํ ๊ฐ
-1๊ณผ 1 ์ฌ์ด์ ๊ฐ์ด ์ฃผ์ด์ง ๊ฒฝ์ฐ, ๊ทธ ๊ฐ์ ์ํฌ์ฝ์ฌ์ธ. ์๋ ๊ฒฝ์ฐ NaN
์ค๋ช
The Math.acos() method returns a numeric value between 0 and ฯ 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).
์์
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.
๋ช ์ธ
| Specification |
|---|
| ECMAScriptยฎ 2026 Language Specification # sec-math.acos |
๋ธ๋ผ์ฐ์ ํธํ์ฑ
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