问题
[$\textcolor{Orange}{\int \frac{1}{\sqrt{1 – x^{2}}} \mathrm{d} x}$] 的积分该怎么计算？选项
[A]. $\int$ $\frac{1}{\sqrt{1 – x^{2}}}$ $\mathrm{d} x$ $=$ $\arcsin x$ $+$ $C$[B]. $\int$ $\frac{1}{\sqrt{1 – x^{2}}}$ $\mathrm{d} x$ $=$ $- \arcsin x$ $+$ $C$
[C]. $\int$ $\frac{1}{\sqrt{1 – x^{2}}}$ $\mathrm{d} x$ $=$ $\arctan x$ $+$ $C$
[D]. $\int$ $\frac{1}{\sqrt{1 – x^{2}}}$ $\mathrm{d} x$ $=$ $\arcsin x$
$$\int \textcolor{Red}{\frac{1}{\sqrt{1 – x^{2}}}} \mathrm{d} x =$$ $$\textcolor{Red}{\arcsin x} + \textcolor{Yellow}{C}.$$