# Hypertext Help with LaTeX
Math function symbols

Functions like "log" or "cos" are normally used in math mode. However, in math mode strings of letters are treated as a product of variables, which would normally be displayed in math italics rather than a text font which would be appropriate for these functions. To get proper display of such functions they are generated with LaTeX commands.

Some of these commands are

- `\arccos`
- `\arcsin`
- `\arctan`
- `\cos`
- `\cosh`
- `\cot`
- `\coth`
- `\csc`
- `\deg`
- `\det`
- `\dim`
- `\exp`
- `\gcd`
- `\hom`
- `\inf`
- `\ker`
- `\lg`
- `\lim`
- `\liminf`
- `\limsup`
- `\ln`
- `\log`
- `\max`
- `\min`
- `\sec`
- `\sin`
- `\sinh`
- `\sup`
- `\tan`
- `\tanh`

Two commands are provided for the "modulus" function

- `\bmod`
- `\pmod{}`

The former would be used to write "a mod b" as

     a \bmod b

and the latter, which requires an argument that is displayed in parentheses, would be used to write "n = i (mod j)" as

     n = i \pmod{j}

Related topics:

- Arrows
- Binary and relational operators
- Delimiters
- Miscellaneous symbols
- Variable size symbols

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