(sin2x+2sinx^2)/1-tanx 化简
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(sin2x+2sinx^2)/1-tanx化简(sin2x+2sinx^2)/1-tanx化简(sin2x+2sinx^2)/1-tanx化简①(sin2x+2sinx²)/1-tanx=
(sin2x+2sinx^2)/1-tanx 化简
(sin2x+2sinx^2)/1-tanx 化简
(sin2x+2sinx^2)/1-tanx 化简
①(sin2x+2sinx²)/1-tanx
=2sinx﹙cosx+sinx﹚/[﹙cosx-sinx﹚/cosx]
=2sinxcosx﹙cosx+sinx﹚²/﹙cos²x-sin²x﹚
=tg2x·﹙cosx+sinx﹚²
②是不是;;1-tanx 应为 1+tanx ,如是
(sin2x+2sinx²)/1+tanx
=2sinx﹙cosx+sinx﹚/[﹙cosx+sinx﹚/cosx]
=sin2x
sinx×2sinx-tanx×sin2x
(sin2x+2sinx^2)/1-tanx 化简
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已知sinx-cosx=1/2,则sin2x=?