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This question already has an answer here:

I just learned that $\text{sen}\,x$ is the Portuguese notation for $\sin x$, and I was inspired to ask:

What differences are there in how mathematics is written around the world?

Note 1: I am likely going to be moving away from home in the upcoming years, so it would be personally nice for me to be aware of some differences in mathematical notation across different countries.

Note 2: I am aware that this question has an almost identical title, but it was only given one answer that would be new to some people (the accepted answer) and I am sure there must be many more differences than that.

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marked as duplicate by user147263, user61527, Michael Albanese, Claude Leibovici, Brian Fitzpatrick May 30 '14 at 5:28

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    $\begingroup$ I was surprised to learn that in Russian, $\tan$ is $\operatorname{tg}$ and $\cot$ is $\operatorname{ctg}$. $\endgroup$ – MJD Apr 19 '14 at 20:18
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    $\begingroup$ @MJD: The same is in Romania. $\endgroup$ – Beni Bogosel Apr 19 '14 at 20:19
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    $\begingroup$ I was surprised to see that US school children learn to compute things like $\sqrt[17]{544}$ until I found out that the notational conventions for long divisions are culture specific. $\endgroup$ – Hagen von Eitzen Apr 19 '14 at 20:21
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    $\begingroup$ $\require{enclose}17\enclose{longdiv}{544}$ \require{enclose} 17\enclose{longdiv}{544} $\endgroup$ – MJD Apr 19 '14 at 20:27
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    $\begingroup$ Hyperbolic function in Russian (Ukrainian) sinh is sh, cosh is ch, tanh is th, cots is cth. Cyclic group $C_n$ is $<a_n>.$ $\endgroup$ – nadia-liza Apr 19 '14 at 20:35
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Most differences are just derived directly from the language. Sine in Portuguese is "seno" so "sen" makes logical sense. In Russian, tangent is тангенс (pronounced as "tangens"). Just use google translate you you should be able to figure out. Some countries use the comma instead of dot to denote decimals: i.e 0,5 instead of 0.5

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  • $\begingroup$ I'm not sure if $\sin x$ is written as $\text{sen }x$ in Spanish, because in the Spanish version of the Wikipedia page for sinus it is written as $\sin x$ and it states that "La abreviatura $\sin(\cdot)$ proviene del latín sĭnus." $\endgroup$ – Américo Tavares Apr 19 '14 at 20:38
  • $\begingroup$ @AméricoTavares: thanks corrected it $\endgroup$ – Sergio Parreiras Apr 19 '14 at 21:07
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    $\begingroup$ Despite Wikipedia, $\text{sen}$ is very used in Spain. $\endgroup$ – Martín-Blas Pérez Pinilla Apr 19 '14 at 21:10