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Diffstat (limited to 'Doc/lib/libmath.tex')
| -rw-r--r-- | Doc/lib/libmath.tex | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/Doc/lib/libmath.tex b/Doc/lib/libmath.tex index 0a45fb3..af1ac10 100644 --- a/Doc/lib/libmath.tex +++ b/Doc/lib/libmath.tex @@ -5,7 +5,19 @@ \modulesynopsis{Mathematical functions (\function{sin()} etc.).} This module is always available. It provides access to the -mathematical functions defined by the C standard. They are: +mathematical functions defined by the C standard. + +These functions cannot be used with complex numbers; use the functions +of the same name from the \refmodule{cmath} module if you require +support for complex numbers. The distinction between functions which +support complex numbers and those which don't is made since most users +do not want to learn quite as much mathematics as required to +understand complex numbers. Receiving an exception instead of a +complex result allows earlier detection of the unexpected complex +number used as a parameter, so that the programmer can determine how +and why it was generated in the first place. + +The following functions provided by this module: \begin{funcdesc}{acos}{x} Return the arc cosine of \var{x}. |