已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)] 已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]的值

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已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)] 已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]的值
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已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)] 已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]的值
已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]
已知
4(sinx)^2-6sinx-(cosx)^2+3cosx=0,
求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]的值

已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)] 已知4(sinx)^2-6sinx-(cosx)^2+3cosx=0,求(cos2x-sin2x)/[(1-cos2x)(1-tan2x)]的值
4(sinx)^2-6sinx-(cosx)^2+3cosx=0
4(sinx)^2-(cosx)^2=6sinx-3cosx
(2sinx-cosx)(2sinx+cosx)=3(2sinx-cosx)
当2sinx-cosx不等于0时
2sinx+cosx=3 -1