A：$0,\frac{\mathrm{\pi }}{2})\cup \frac{3\mathrm{\pi }}{4},\mathrm{\pi })$

B：$0,\frac{\mathrm{\pi }}{6}\cup \frac{5\mathrm{\pi }}{6},\mathrm{\pi })$

C：$\frac{\mathrm{\pi }}{6},\frac{\mathrm{\pi }}{2})\cup (\frac{\mathrm{\pi }}{2},\frac{5\mathrm{\pi }}{6}$

D：$-\frac{\mathrm{\pi }}{4},\frac{\mathrm{\pi }}{2})$