StrictMath cos() Method in Java with Examples

Last Updated : 11 Jul, 2025

All methods of java.lang.StrictMath class : Set 1, Set 2
The java.lang.StrictMath.cos() is an inbuilt method in Java which is used to return the cosine value of a given angle. The method returns NaN when the given argument is NaN or infinity.
Syntax:

public static double cos(double num)

Parameters: The method accepts one parameter num of double type and refers to the angle in radian whose cosine value is to be returned.
Return Value: The method returns the cosine of the argument.
Examples :

Input: num = 62.0
Output: 0.6735071623235862

Input: num = 64.6
Output: -0.19607204956188945

Below programs illustrate the java.lang.StrictMath.cos() method:
Program 1:

java

// Java program to illustrate the
// java.lang.StrictMath.cos()
import java.lang.*;

public class Geeks {

public static void main(String[] args) {

    double num1 = 0.0, num2= 1.0 , num3= 64.6;
    
    /* Returns trigonometric cosine of specified
    angle in radian*/ 
    double cosValue = StrictMath.cos(num1); 
    System.out.println(&quot;The cosine of &quot;+
                           num1+&quot; = &quot; + cosValue);

    cosValue = StrictMath.cos(num2); 
    System.out.println(&quot;The cosine of &quot;+
                           num2+&quot; = &quot; + cosValue);

    cosValue = StrictMath.cos(num3); 
    System.out.println(&quot;The cosine of &quot;+
                           num3+&quot; = &quot; + cosValue);}
}

Output:

The cosine of 0.0 = 1.0
The cosine of 1.0 = 0.5403023058681398
The cosine of 64.6 = -0.19607204956188945

Program 2:

java

// Java program to illustrate the
// java.lang.StrictMath.cos()
import java.lang.*;

public class Geeks {

public static void main(String[] args) {

    double num1= -62.0, num2 = 1.0;
        double num3= (45*(Math.PI))/180;
    
    /* It returns the  cosine of specified
    angle in radian*/ 
    double cosValue = StrictMath.cos(num1); 
    System.out.println(&quot;The cosine of &quot;+
                           num1+&quot; = &quot; + cosValue);
    cosValue = StrictMath.cos(num2); 
    System.out.println(&quot;The cosine of &quot;+
                           num2+&quot; = &quot; + cosValue);
    cosValue = StrictMath.cos(num3); 
    System.out.println(&quot;The cosine of &quot;+
                           num3+&quot; = &quot; + cosValue);}
}

Output:

The cosine of -62.0 = 0.6735071623235862
The cosine of 1.0 = 0.5403023058681398
The cosine of 0.7853981633974483 = 0.7071067811865476

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StrictMath cos() Method in Java with Examples

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