Java Math acos() method with Examples
Last Updated :
05 Apr, 2018
The java.lang.Math.acos() returns the arc cosine of an angle in between 0.0 and pi. Arc cosine is also called as inverse of a cosine.If the argument is NaN or its absolute value is greater than 1, then the result is NaN.
Syntax :
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.
Example :To show working of java.lang.Math.acos() method.
import java.lang.Math;
class Gfg {
public static void main(String args[])
{
double a = Math.PI;
System.out.println(Math.acos(a));
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));
System.out.println(Math.acos(f));
}
}
|
Output:
NaN
1.5159376794536454
0.0
1.5707963267948966
3.141592653589793
NaN
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