化简1+sin²x-cos²x-sinx/2sinxcosx-cosx化简1+sin²x-cos²x-sinx_______________2sinxcosx-cosx
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化简1+sin²x-cos²x-sinx/2sinxcosx-cosx化简1+sin²x-cos²x-sinx_______________2sinxcosx-cosx
化简1+sin²x-cos²x-sinx/2sinxcosx-cosx
化简
1+sin²x-cos²x-sinx
_______________
2sinxcosx-cosx
化简1+sin²x-cos²x-sinx/2sinxcosx-cosx化简1+sin²x-cos²x-sinx_______________2sinxcosx-cosx
(1+sin^2x-cos^2x-sinx)/(2sinxcosx-cosx)
=(2sin^2x-sinx)/[(2sinx-1)cosx]
=sinx(2sinx-1)/[(2sinx-1)cosx]=sinx/cosx=tanx