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arctan

Purpose
Get the arctangent of a value.
Synopsis
function arctan(r:real):real
Argument
r 
Real number to which to apply the trigonometric function
Return value
Arctangent of the argument.
Example
The following functions compute the arcsine and arccosine of a value: 
function arcsin(s:real):real
 returned:=arctan(s/sqrt(1-s^2))
end-function

function arccos(c:real):real
 returned:=arctan(sqrt(1-c^2)/c)
end-function
Related topics
cos, sin

Parent Topic Predefined functions and procedures

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