化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
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化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))化简tan(3x
化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
原式=sin3x/2/cos3x/2-sinx/2/cosx/2-sinx/cos3x/2cosx/2
=(sin3x/2cosx/2-sinx/2cos3x/2)/cos3x/2cosx/2-sinx/cos3x/2cosx/2
=sin(3x/2-x/2)/cos3x/2cosx/2-sinx/cos3x/2cosx/2
=sinx/cos3x/2cosx/2-sinx/cos3x/2cosx/2
=0
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化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
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