If \( \dfrac{dy}{dx} + 2y \tan x = \sin x, \, 0 < x < \dfrac{\pi}{2} \) and \( y\!\left(\dfrac{\pi}{3}\right) = 0 \), then the maximum value of \( y(x) \) is:
\( \dfrac{1}{8} \)
\( \dfrac{3}{4} \)
\( \dfrac{1}{4} \)
\( \dfrac{3}{8} \)