Find all solutions of the equation cos(x) sin(x) - 2 cos(x) = 0. The answer is in the form aπ, where 0 < a < π. What are the values of a and b?
a) a = 0.5, b = 2
b) a = 1, b = 2
c) a = 0.5, b = 1
d) a = 1, b = 1