arctan  arctangent function (radians) 
Syntax  arctan (r : real) : real

Description  The arctan function is used to find the arc tangent of a value. The result is given in radians. For example, arctan (1) is p / 4.

Example  This program prints out the arctangent of 0 through 3 in radians.
for i : 0 .. 12 const arg := i / 4 put "Arc tangent of ", arg, " is ", arctan (arg), " radians" end for 
Execute  
See also  the arcsin and arccos functions for calculating arcsine and arccosine the arctand function which finds the arc tangent of a value with the result given in degrees. (2p radians are the same as 360 degrees.) See also predefined unit Math.
