Math.sin(angle) Last updated: 16. May 2026

Returns the sine of a number in radians. The returned value is between -1 and 1.

See also: Math.cos Math.tan Math.atan

Parameters

Name	Type	Description
angle	number	A number representing an angle in radians.

Returns

A number between -1 and 1, representing the sine of the given angle (in radians).

Example

Code example (JS)

JS is normal JavaScript either running in the browser or on the Docly™ server.

function getSinFromDegrees(degrees) {
  return Math.sin(degrees * Math.PI / 180);
}

write(Math.sin(0));
write("\n");
write(Math.sin(Math.PI / 2));
write("\n");
write(getSinFromDegrees(90));
/* Expected output:
0
1
1
*/

Output

The JS code above produces the output shown below:

0
1
1