There are 1 questions in this calculation: for each question, the 1 derivative of a is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 45sin(a) + ecos(a)\ with\ respect\ to\ a：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 45sin(a) + ecos(a)\right)}{da}\\=&45cos(a) + 0cos(a) + e*-sin(a)\\=&45cos(a) - esin(a)\\ \end{split}\end{equation} \]

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