arctan

#arctan

##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

##See also the arcsin.html and arccos.html functions for calculating arcsine and arccosine

the arctand.html 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 mathmodule.html.