Tìm GTLN; GTNN của hàm số: y = 2sin^2 3x + 4sin3xcos3x + 1 / sin6x + 4cos6x + 10

A. $\min \mathrm{y}=\frac{22-9\sqrt{7}}{83}; \max \mathrm{y}=\frac{22+9\sqrt{7}}{83}$

B. $\min \mathrm{y}=\frac{21-9\sqrt{7}}{83}; \max \mathrm{y}=\frac{21+9\sqrt{7}}{83}$

C. $\min \mathrm{y}=\frac{20-9\sqrt{7}}{83}; \max \mathrm{y}=\frac{20+9\sqrt{7}}{83}$

D. $\min \mathrm{y}=\frac{12-9\sqrt{7}}{83}; \max \mathrm{y}=\frac{12+9\sqrt{7}}{83}$