Solve the following equation
dy/dt + (5 tan(5t))y = cos(5t) subject to the condition that cos(5t) > 0. Select all the correct answers a. y = (t + C) cos(5t) where C is an arbitrary constant.
b. y = t cos(5t) + C where C is an arbitrary constant. c. y = 5t cos(t) + C where C is an arbitrary constant.
d. The ODE is exact e. y = (5t + C) cos(t) where C is an arbitrary constant. f. The ODE is of linear differential form