Java 中的 StrictMath asin()方法，带示例
原文:https://www . geesforgeks . org/strict math-asin-in-method-in-Java-with-examples/
Java . lang . StrictMath . asin()是 strict math 类的内置方法，用于返回指定值的反正弦。返回角度在-π/2和π/2范围内。该方法产生两个特殊结果:
- 如果参数的绝对值大于 1 或者参数本身是 NaN，那么结果也是 NaN。
- 如果传递的参数是 0，则输出也是 0，符号与参数相同。
语法:
public static double asin(*double val*)
参数:该方法接受一个双型参数值，指的是要返回其反正弦的值。
返回值:该方法返回自变量的反正弦值。 例:
Input: val = 0.72
Output: 0.80380231893303
Input: val = 7.0
Output: NAN
Input: val = 0.0
Output: 0.0
下面的程序说明了 java.lang.StrictMath.asin()方法: 程序 1:
// Java program to illustrate the
// java.lang.StrictMath.asin()
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
double val1 = 0.65, val2 = 3.00, val3 = 0;
double asinvalue = StrictMath.asin(val1);
System.out.println(" The arc sine value is = "+
asinvalue);
asinvalue = StrictMath.asin(val2);
System.out.println("The arc sine value is = "+
asinvalue);
asinvalue = StrictMath.asin(val3);
System.out.println("The arc sine value is = "+
asinvalue);
}
}
Output:
The arc sine value is = 0.7075844367253556
The arc sine value is = NaN
The arc sine value is = 0.0
程序 2:
// Java program to illustrate the
// java.lang.StrictMath.asin()
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
double val1 = -0.85, val2 = -2.00, val3 = 0;
double asinvalue = StrictMath.asin(val1);
System.out.println(" The arc sine value is = "+
asinvalue);
asinvalue = StrictMath.asin(val2);
System.out.println("The arc sine value is = "+
asinvalue);
asinvalue = StrictMath.asin(val3);
System.out.println("The arc sine value is= "+
asinvalue);
}
}
Output:
The arc sine value is = -1.015985293814825
The arc sine value is = NaN
The arc sine value is= 0.0
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