Let f (x) = SiNx * (cosx radical 3sinx) (1) Find the monotone increasing interval of function f (x) on [0, π], (2) If the corresponding sides of the internal angles a, B, C of △ ABC are a, B, C respectively, and f (b) = 0, a, B, and the root 3C forms an arithmetic sequence with tolerance greater than 0, the value of sina / sinc can be obtained

Let f (x) = SiNx * (cosx radical 3sinx) (1) Find the monotone increasing interval of function f (x) on [0, π], (2) If the corresponding sides of the internal angles a, B, C of △ ABC are a, B, C respectively, and f (b) = 0, a, B, and the root 3C forms an arithmetic sequence with tolerance greater than 0, the value of sina / sinc can be obtained

(1) F (x) = sinxcosx - √ 3sin & # 178; X = (1 / 2) sin2x - (√ 3 / 2) (1-cox2x) = (1 / 2) sin2x + (√ 3 / 2) cox2x - √ 3 / 2 = sin (2x + π / 3) - √ 3 / 20 ≤ x ≤ π π / 3 ≤ 2x + π / 3 ≤ 2 π + π / 3, let 2x + π / 3 = π / 2 = = > x = π / 12, be the highest point of the function; let 2x + π / 3 = 2 π / 2 = = = = =