The java.lang.Math.cos() returns the trigonometric cosine of an angle. If the argument is NaN or an infinity, then the result returned is NaN. The returned value will be in range [-1, 1].
Syntax :
public static double cos(double angle) Parameters: The function has one mandatory parameter angle which is in radians.
Returns :
The function returns the trigonometric cosine of an angle.
Example 1 : To show working of java.lang.Math.cos() method.
// Java program to demonstrate working // of java.lang.Math.cos() method import java.lang.Math;
class Gfg {
// driver code
public static void main(String args[])
{
double a = 30 ;
// converting values to radians
double b = Math.toRadians(a);
System.out.println(Math.cos(b));
a = 45 ;
// converting values to radians
b = Math.toRadians(a);
System.out.println(Math.cos(b));
a = 60 ;
// converting values to radians
b = Math.toRadians(a);
System.out.println(Math.cos(b));
a = 0 ;
// converting values to radians
b = Math.toRadians(a);
System.out.println(Math.cos(b));
}
} |
Output:
0.8660254037844387 0.7071067811865476 0.5000000000000001 1.0
Example 2 : To show working of java.lang.Math.cos() method when argument is NAN or infinity.
// Java program to demonstrate working // of java.lang.Math.cos() method infinity case import java.lang.Math; // importing java.lang package
public class GFG {
public static void main(String[] args)
{
double positiveInfinity =
Double.POSITIVE_INFINITY;
double negativeInfinity =
Double.NEGATIVE_INFINITY;
double nan = Double.NaN;
double result;
// Here argument is negative infinity,
// output will be NaN
result = Math.cos(negativeInfinity);
System.out.println(result);
// Here argument is positive infinity,
// output will also be NaN
result = Math.cos(positiveInfinity);
System.out.println(result);
// Here argument is NaN, output will be NaN
result = Math.cos(nan);
System.out.println(result);
}
} |
Output:
NaN NaN NaN