atan

Summary

Returns the arctangent of a number.

Syntax

Math.atan( number )

Examples

var v1 = Math.atan(-1.0);
document.write(v1);
// Output: -0.7853981633974483

Remarks

The required number argument is a numeric expression for which the arctangent is needed.

The return value is the arctangent of the number argument, in radians.

Applies To : Math Object

See also

Other articles

• Math.acos Function
• Math.asin Function
• Math.atan2 Function
• Math.cos Function
• Math.sin Function
• Math.tan Function
• Math Object

Attributions

• Microsoft Developer Network: Article