math.asin

JavaScript | Math.asin()方法 (JavaScript | Math.asin() Method)

Math.asin() is a function in math library of JavaScript that is used to find the value of arcsine of a number and return the value in radians.

Math.asin()是JavaScript數學庫中的函數，用于查找數字的反正弦值并返回以弧度表示的值。

The values accpeted are y such that y = sin(x)

賦值的值為y ，使得y = sin(x)

Syntax:

句法：

    Math.asin(x);

Parameter(s):

參數：

• x – It represents the value whose arcsine value to be found.

  x –表示要找到其反正弦值的值。

Return value:

返回值：

The return type of this method is number, it returns the arcsine value of the given x.

此方法的返回類型為number ，它返回給定x的反正弦值。

Values accepted: Integer, floating-point, numeric string.

接受的值：整數，浮點數，數字字符串。

Invalid Values: non-numeric string, empty variable, empty array all will return NaN (Not a Number).

無效值：非數字字符串，空變量，空數組都將返回NaN(非數字)。

Browser support: Chrome, Internet asinlorer, Mozilla, Safari, Opera mini.

瀏覽器支持： Chrome，Internet代理，Mozilla，Safari，Opera mini。

Example 1: Valid values

示例1：有效值

console.log(Math.asin(-1));
console.log(Math.asin(0.1));
console.log(Math.asin(0));
console.log(Math.asin("0.65"));

Output

輸出量

-1.5707963267948966
0.1001674211615598
0
0.7075844367253556

Example 2: Invalid values

示例2：無效值

console.log(Math.asin("Javascript"));
console.log(Math.asin(2));

Output

輸出量

NaN
NaN

翻譯自: https://www.includehelp.com/code-snippets/math-asin-method-with-example-in-javascript.aspx

math.asin