Lingo Dictionary > A-C > atan()

 

atan()

Syntax

(number).atan
atan (number)

Description

Math function; calculates the arctangent, which is the angle whose tangent is a specified number. The result is a value in radians between pi/2 and +pi/2.

Example

This statement displays the arctangent of 1:

(1).atan

The result, to four decimal places, is 0.7854, or approximately pi/4.

Note that most trigonometric functions use radians, so you may want to convert from degrees to radians.

Example

This handler lets you convert between degrees and radians:

on DegreesToRads degreeValue
	return degreeValue * PI/180
end

The handler displays the conversion of 30 degrees to radians in the Message window:

put DegreesToRads(30)
-- 0.5236

See also

cos(), PI, sin()