JavaScript Math sin()

sin() Syntax

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

Math.sin(angle)

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

sin() Parameter

The sin() method takes a single parameter:

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

sin() Return Value

The sin() method returns:

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

Example 1: JavaScript Math.sin()

In the above example,

• Math.sin(5) - computes the sine value of the angle 5
• Math.sin(-2) - computes the sine value of the angle -2

Example 2: Math.sin() with Math Constants

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

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

Example 3: Math.sin() with Non-Numeric Arguments

In the above example, we have tried to calculate the sine value of the string "David". Hence, we get NaN as the output.

Example 4: Math.sin() with Infinity argument

The sin() method doesn't treat infinity as a number so the method returns NaN with this argument.

Also, the sine of an infinite angle is indefinite, which can't be defined with a number.

Recommended readings:

• JavaScript Math.cos()
• JavaScript Math.tan()
• JavaScript Math.asin()