Atan

Trigger: Atan (math)

Computes the arctangent (in radians) of the specified argument.

Format:

atan(exprn)

Arguments:

exprn

Expression to compute the arctangent of (float).

Return type:

float

Error conditions:

Returns SFalse if exprn evaluates to SFalse.

Example:

value = atan(1)
  Sets value to the arccosine of 1, which is approximately pi/4
  (possibly with some rounding error.)