arccosd

#arccosd

##Syntax arccosd (r : real) : real

##Description The arccosd function is used to find the arc cosine of an angle given in degrees. For example, arccosd (0.5) is 60.

##Example This program prints out the arccosine of values from -1 to 1 in degrees.

    for i : -4 .. 4
        const arg := i / 4
        put "Arc cosine of ", arg, " is ",
            arccosd (arg), " degrees"
    end for

##See also the arcsind.html and arctand.html functions for calculating arcsine and arctangent

the arccos.html function which finds the arc cosine of a value with the result given in radians. (2p radians are the same as 360 degrees.)

See also predefined unit mathmodule.html.