The java.lang.Math.atan() returns the arc tangent of an angle in between -pi/2 through pi/2. If the argument is NaN, then the result is NaN.
Note:If the argument is zero, then the result is a zero with the same sign as the argument.
Syntax :
public static double atan(double a) Parameter : a : the value whose arc tangent is to be returned. Return : This method returns the arc tangent of the argument.
Example :To show working of java.lang.Math.atan() method.
// Java program to demonstrate working // of java.lang.Math.atan() method import java.lang.Math;
class Gfg {
// driver code
public static void main(String args[])
{
double a = Math.PI;
System.out.println(Math.atan(a));
double c = 344.0 ;
double d = 0.0 ;
double e = - 0.0 ;
double f = 1.5 ;
System.out.println(Math.atan(c));
// Input positive zero
// Output positive zero
System.out.println(Math.atan(d));
// Input negative zero
// Output negative zero
System.out.println(Math.atan(e));
System.out.println(Math.atan(f));
}
} |
Output:
1.2626272556789115 1.5678893582391513 0.0 -0.0 0.982793723247329