The sin method of javascript defines a sin of a number. Where the number is a numeric expression, representing the size of an angle in radians. See the syntax below -

Syntax:

Math.sin(number)

The sin method returns a numeric value between -1 and one, which represents the sin of the argument.

For Example If you want to get the sin value for a number specified in radians. The function returns a value between -1 and 1 for the given angle. For example lets try to calculate sine value for numbers "1","2".

document.write('Sine value of 2 is::'+Math.sin(2));
document.write('Sine value of 1 is::'+Math.sin(1));

Output of the following code:-

Sine value of 2 is::0.9092974268256817
Sine value of 1 is::0.8414709848078965