Integrate the functions $$\frac{1}{\sqrt{7-6x-x^2}}$$

Question

$\begin{array}{1 1} \sin^{-1} \large \frac{(x+3)}{4}+c\\ \sin^{-1} \large \frac{(x-3)}{4}+c \\\cos^{-1} \large \frac{(x+3)}{4}+c \\ \cos^{-1} \large \frac{(x-3)}{4}+c \end{array}$