atan - luxembourg/muxcode-clm GitHub Wiki
ATAN() ATAN2()
FUNCTION: atan(<number>[, <units>]) atan2(<number1>, <number2>[, <units>])
Returns the arctangent of <number> or <number1>/<number2>. The range of atan() is always an angle in quadrants 1 and 4. Taking into consideration the sign of <number1> and <number2>, atan2() can return an angle in all four quadrants. The value returned will be expressed in <units>. <units> may be 'radians', 'degrees', or 'gradians' or just the first letter of any of these. By default, <units> is 'radians'.
In a circle, there are 2*pi() radians, 360 degrees, and 400 gradians.
Examples: > say atan(0) You say, "0" > say tan(1) You say, "1.5574077246549023" > say atan(1.5574077246549023) You say, "1"