Java Math cos()

Syntax of Math cos() in Java

The syntax of the cos() method is:

The method signature looks like this:

Here, cos() is a static method. So, we are accessing the method using the class name Math.

Learn more about static methods in Java here.

Parameters of Math cos() in Java

The cos() method accepts a single parameter angle, measured in radians, whose trigonometric cosine will be returned.

Return Value of Math cos() in Java

Return type : double

Math cos() method returns the trigonometric cosine of the specified angle It also returns NaN if the specified angle is NaN or infinity.

Exceptions of Math cos() in Java

The Math.cos() method in Java does not throw any exceptions.

Example

Let's see an implementation of Math.cos() method in Java

Output

Explanation:

The angles 30 and 45 degrees are first converted to radians using the Math.toRadians() method. The Math.cos() method is then used to calculate the cosine values of the angles, which are subsequently printed to the console as 0.8660254037844387 and 0.7071067811865476, respectively.

What is Math cos() in Java?

The Math.cos() method returns a double value between -1 and 1, representing the angle's cosine.

Because cos() is a static method of Math so, you always use it as Math.cos(), rather than as a method of a Math object you created.

Let's see an implementation of java.lang.Math.cos() in Java

Output

More Examples

Below is a Java code that demonstrates using the cos() method of Math class.

Output:

The Java example source code up top demonstrates the use of the Math class's cos() method. We only request user input and parse it using the Scanner class.

Since the console result was obtained using the nextLine() method and the return data type was String, we converted it to a double using Double.parseDouble().

Because the cos() method only accepts double method arguments, we must first convert it to double.

We also used Math.toRadians() to convert the data to radians, which is the necessary method argument, after converting it into double.

Example 1: Using Math cos() with Double.MAX_VALUE

Output:

where, Double.MAX_VALUE is a constant holding the largest positive finite value of type double

The value is stored in a'; it is then converted to radians using the Math. radians ()function and stored inb; we then use the cos()method onb` to obtain its cosine value.

Example 2: Using Math cos() with Double.POSITIVE_INFINITY

Let’s see the implemenation of cos() with Double.POSITIVE_INFINITY in Java

Output

where Double.POSITIVE_INFINITY is a constant holding the positive infinity of type double.

We then use the cos() method to obtain its result. Since If the argument is an infinity, then Math.cos() returns NaN as a result.

Example 3: Using Math cos() with Double.NEGATIVE_INFINITY

Let’s see the implementation of cos() with Double.NEGATIVE_INFINITY in Java.

Output

This is the constant holding the negative infinity of type double. We've used the cos() method to obtain its result. Since If the argument is an infinity, then Math.cos() returns NaN.

Example 4: Using Math cos() with Double.NaN

Let’s see the cos() implementation with Double.NaN in Java.

Output

Since the argument is NaN, then Math.cos() returns NaN.