Solve the equation. (Find all solutions of the interval [0, 2π). 3tan(2x) - 6cos(x) = 0

a) x = π/6, π/2, 5π/6
b) x = π/3, π/2, 2π/3
c) x = π/6, π/3, 2π/3
d) x = π/4, π/2, 3π/4