# Jakub Marian’s Educational blog

 So, thus, therefore, and hence in English Since you are reading this article in English, the odds are you already know what the conjunction “so” means. You probably also know that (...) October 5, 2017 – Jakub Marian – English
 ‘October’ in European languages In the Roman calendar, the year began with March, not January, so October was the eighth month of the year—hence the Latin name october, (...) October 2, 2017 – Jakub Marian – Maps
 Average hours worked per worker per week in Europe The following map shows the number of hours workers in each country work per week, on average, including both full-time and part-time (...) September 27, 2017 – Jakub Marian – Maps

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 Integral of $\cot(x)$ To integrate cot(x), recall that cot(x) = cos(x)/sin(x), so ∫ cot(x) dx = ∫ cos(x)/sin(x) dx. (...) September 21, 2017 – Jakub Marian – Mathematics
 Integral of $\sin(x)\cos(x)$ The function $\sin(x)\cos(x)$ is one of the easiest functions to integrate. All you need to do is to use a simple substitution \$u = (...) September 6, 2017 – Jakub Marian – Mathematics