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

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