Chapter 1.9, Problem 13E

In Exercises 13-18, the differential equation is linear, and in theory, we can find itsgeneral solution using the method of integrating factors. However, since this methodinvolves computing two integrals, in practice it is frequently impossible to reach a formula for the solution that is free of integrals. For these exercises, determine the generalsolution to the equation and express it with as few integrals as possible.
13. $\frac{dy}{dt}=\left(\sin t\right)y+4$