The integral $\int_0^{\pi/4} \frac{\sin x + \cos x}{9 + 16\sin 2x} dx$ is equal to:
(1) $\frac{1}{20} \log 3$
(2) $\log 3$
(3) $\frac{1}{20} \log 9$
(4) $\frac{1}{10} \log 3$
The integral $\int_0^{\pi/4} \frac{\sin x + \cos x}{9 + 16\sin 2x} dx$ is equal to:\\
(1) $\frac{1}{20} \log 3$\\
(2) $\log 3$\\
(3) $\frac{1}{20} \log 9$\\
(4) $\frac{1}{10} \log 3$