f(x)
= (m+n).n
= (sinx+√3cosx)sinx + (3/2)
= (sinx)^2 + √3/2sin2x + 3/2
= (1-cos2x)/2+ √3/2sin2x + 3/2
=-cos2x/2 + √3/2sin2x + 2
= sin(2x-30°) + 2
最小正周期 = 90°
单调递增区间:
360°k -90°
f(x)
= (m+n).n
= (sinx+√3cosx)sinx + (3/2)
= (sinx)^2 + √3/2sin2x + 3/2
= (1-cos2x)/2+ √3/2sin2x + 3/2
=-cos2x/2 + √3/2sin2x + 2
= sin(2x-30°) + 2
最小正周期 = 90°
单调递增区间:
360°k -90°