Can you explain to me how to do this problem?

Determine whether the following equation is separable. If so, solve the given initial value problem. 3 sec x - (y (x)) =y , y(0) = 1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The solution to the initial value problem is y = (Type an exact answer, using radicals as needed.) O B. The equation is not separable