I was stuck on evaluating this integral :$$I=\int_{\pi/4}^{3\pi/4}\dfrac{\sin x\; \rm dx}{4^{\pi/4}+4^{\tan^{-1}{\left(\frac{4^x}{2^{\pi}}\right)}}}\tag{1}\label{eq1}$$
My attempt:
I used a property of Definite integration, which says, $\int_a^b f (x) \, \rm dx=\int_a^b f (a+b-x) \, \rm dx$. This converted $I$ to $$I=\int_{\pi/4}^{3\pi/4}\dfrac{\sin x\; \rm dx}{4^{\pi/4}+4^{\cot^{-1}{\left(\frac{4^x}{2^{\pi}}\right)}}}\tag{2}\label{eq2}$$ Adding \eqref{eq1} and \eqref{eq2} won't give result in any simplifactions. What else could be done?