March 2000
Intermediate to advanced
576 pages
18h 13m
English
Content preview from Delphi in a Nutshell
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Name
ArcTan Function
Syntax
function ArcTan(Number: Floating-point type): Extended;Description
The ArcTan
function returns the arctangent in
radians of Number. The ArcTan
function is built-in.
Tips and Tricks
Delphi automatically converts
IntegerandVariantarguments to floating-point. To convert anInt64argument to floating-point, add 0.0.If
Numberis positive infinity, the result is /2 (or more accurately, Delphi’s best approximation of /2); ifNumberis negative infinity, the result is an approximation of -/2.If
Numberis a quiet NaN, the result isNumber.If
Numberis a signaling NaN,Arctanreports runtime error 6 (EInvalidOp).
See Also
| Cos Function, Sin Function |
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