There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ arccos(x) + Bsin(x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( arccos(x) + Bsin(x)\right)}{dx}\\=&(\frac{-(1)}{((1 - (x)^{2})^{\frac{1}{2}})}) + Bcos(x)\\=&\frac{-1}{(-x^{2} + 1)^{\frac{1}{2}}} + Bcos(x)\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( \frac{-1}{(-x^{2} + 1)^{\frac{1}{2}}} + Bcos(x)\right)}{dx}\\=&-(\frac{\frac{-1}{2}(-2x + 0)}{(-x^{2} + 1)^{\frac{3}{2}}}) + B*-sin(x)\\=&\frac{-x}{(-x^{2} + 1)^{\frac{3}{2}}} - Bsin(x)\\ \end{split}\end{equation} \]

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