2sinxcsx-根号3cos2x 化简

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2sinxcsx-根号3cos2x化简2sinxcsx-根号3cos2x化简2sinxcsx-根号3cos2x化简2sinxcosx-根号3cos2x=sin2x-√3cos2x=2(sin2xcos

2sinxcsx-根号3cos2x 化简
2sinxcsx-根号3cos2x 化简

2sinxcsx-根号3cos2x 化简
2sinxcosx-根号3cos2x
=sin2x-√3cos2x
=2(sin2xcosπ/3-cos2xsinπ/3)
=2sin(2x-π/3)

原式= sin2x-√3cos2x
=2(sinx*1/2-cos2x*√3/2)
=2(sinxcosπ/3-cos2xsinv)
=2sin(2x-π/3)

原式=sin2x-根号3cos2x=2(1/2sin2x-根号3/2cos2x)=2sin(2x-π/3)
sin2x=2sinxcosx
cosπ/3=1/2 sinπ/3=根号3/2
第二步是辅助角公式