Problem: Find a uniformly valid approximation to the solution of $\epsilon y'' + (\cosh x)y' + y = 0$ with boundary conditions $y(-1) = 0, y(1) = 1$ in the limit $\epsilon \to 0^+$. Use only the variables and constants given in the problem; do not define additional constants. Place your final solution in a $\boxed{}$ LaTeX environment.
Solution: $$\boxed{y(x) = \exp (2(\arctan(e)-\arctan(e^{x})))-\exp(2(\arctan(e)-\arctan(e^{-1})))e^{-\cosh(1)\frac{x+1}{\epsilon}}}$$