JavaScript Math tan()

tan() Syntax

The syntax of the Math.tan() method is:

Math.tan(angle)

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

tan() Parameter

The tan() method takes a single parameter:

• angle - in radians whose tangent value is to be calculated

tan() Return Value

The tan() method returns:

• tangent of a given angle (in radians)
• NaN (Not a Number) for a non-numeric argument

Example 1: JavaScript Math.tan()

In the above example,

• Math.tan(5) - calculates the tangent of 5
• Math.tan(-2) - calculates the tangent of -2

Example 2: Math.tan() with Math Constants

In the above example, we have used the tan() method to compute the tangent of the math constant PI.

Here, the output -1.2246467991473532e-16 represents -1.2246467991473532 * 10^-16.

Example 3: Math.tan() with Non-Numeric argument

In the above example, we have used the tan() method with a string argument.

When using a string argument, the method gives us NaN as output.

Example 4: Math.tan() with Infinity argument

The tan() method doesn't treat -Infinity and Infinity as numbers and produces NaN as output.

This is because the tangent of an angle can never be infinite.

Recommended readings:

• JavaScript Math atan()
• JavaScript Math sin()
• JavaScript Math cos()