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arctan

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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

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