There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 20sin(\frac{2x}{π} + π)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 20sin(\frac{2x}{π} + π)\right)}{dx}\\=&20cos(\frac{2x}{π} + π)(\frac{2}{π} + 0)\\=&\frac{40cos(\frac{2x}{π} + π)}{π}\\ \end{split}\end{equation} \]

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