Java 数学 acos()方法，带示例
原文:https://www . geesforgeks . org/Java-math-acos-method-examples/
java.lang.Math.acos() 返回 0.0 到π之间角度的弧余弦。弧形余弦也称为余弦的倒数。如果参数为 NaN 或其绝对值大于 1，则结果为 NaN。
语法:
public static double acos(double a)
Parameter :
a : the value whose arc cosine is to be returned.
Return :
This method returns the arc cosine of the argument.
示例:展示 java.lang.Math.acos() 方法的工作。
// Java program to demonstrate working
// of java.lang.Math.acos() method
import java.lang.Math;
class Gfg {
// driver code
public static void main(String args[])
{
double a = Math.PI;
// Output is NaN, because Math.PI gives 3.141 value
// greater than 1
System.out.println(Math.acos(a));
// convert Math.PI to radians
double b = Math.toRadians(a);
System.out.println(Math.acos(b));
double c = 1.0;
double d = 0.0;
double e = -1.0;
double f = 1.5;
System.out.println(Math.acos(c));
System.out.println(Math.acos(d));
System.out.println(Math.acos(e));
// value of f does not lie in between -1 and 1
// so output is NaN
System.out.println(Math.acos(f));
}
}
输出:
NaN
1.5159376794536454
0.0
1.5707963267948966
3.141592653589793
NaN
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