Best way to denote some trigonometric functions ("tg" vs "tan", "ctg" vs "cot")
What is the best way to denote tangent and other trigonometric functions: tg or tan, ctg or cot. What notation is commonly used and standardized?
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$\begingroup$In current US textbooks, $\tan$ and $\cot$ are commonly used and standardized. Also: $\sin, \cos, \sec, \csc$. In other countries, and in the 19th century, you will find others.
$\endgroup$ $\begingroup$Standard
ISO 80000-2 Quantities and units — Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
is perfectly clear: the right symbols are $\tan x$ (item 2-13.4) and $\cot x$ (item 2-13.5).
To cite the standard: "$\text{tg } x$, $\text{ctg } x$ should not be used."
$\endgroup$ 6 $\begingroup$Some people are familiar with tg and some people are familiar with tan.So, for wide use just define the notation.It solve your's problem I think.
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