MathF.Asin(Single) 方法

定义

返回正弦值为指定数字的角度。Returns the angle whose sine is the specified number.

public:
 static float Asin(float x);
public static float Asin (float x);
static member Asin : single -> single
Public Shared Function Asin (x As Single) As Single

参数

x
Single

一个表示正弦值的数字,其中 x 必须大于或等于 -1 但小于或等于 1。A number representing a sine, where x must be greater than or equal to -1, but less than or equal to 1.

返回

角度 θ,以弧度为单位,满足 -π/2 ≤ θ ≤ π/2。An angle, θ, measured in radians, such that -π/2 ≤ θ ≤ π/2.

- 或 --or- 如果 x < -1 或 x > 1 或 x 等于 NaN,则为 NaNNaN if x < -1 or x > 1 or x equals NaN.

注解

正返回值表示从 x 轴开始的逆时针角度;负值返回值表示顺时针角度。A positive return value represents a counterclockwise angle from the x-axis; a negative return value represents a clockwise angle.

将返回值乘以 180/MathF.PI,以将弧度转换为度。Multiply the return value by 180/MathF.PI to convert from radians to degrees.

适用于