函數(shù)f(x)=(根號3)sin2x-2sin^2x.求最小正周期,單調(diào)遞增區(qū)間,單調(diào)遞減區(qū)間...
函數(shù)f(x)=(根號3)sin2x-2sin^2x.求最小正周期,單調(diào)遞增區(qū)間,單調(diào)遞減區(qū)間...
函數(shù)f(x)=(根號3)sin2x-2sin^2x.求最小正周期,單調(diào)遞增區(qū)間,單調(diào)遞減區(qū)間,對稱軸方程,對稱中心.
函數(shù)f(x)=(根號3)sin2x-2sin^2x.求最小正周期,單調(diào)遞增區(qū)間,單調(diào)遞減區(qū)間,對稱軸方程,對稱中心.
數(shù)學(xué)人氣：564 ℃時間：2020-01-31 02:22:23
優(yōu)質(zhì)解答
f(x) = √3sin2x-2sin^2x= √3sin2x - (1-cos2x)= √3sin2x + cos2x - 1= 2(sin2xcosπ/6+cos2xsinπ/6) - 1= 2sin(2x+π/6) - 1最小正周期=2π/2=π2x+π/6∈（2kπ-π/2,2kπ+π/2）時單調(diào)增,所以單調(diào)增區(qū)間（kπ-...
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