(sin2x+2sinx^2)/1-tanx 化简

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 11:49:44
(sin2x+2sinx^2)/1-tanx 化简
x)(36RqF%y O{=_`TO@~ 1<Y5\!X-XΙ,h.LĉEipL tC۱j+PPPx4q"{z!5Ɏ] @~7tYPFM_l~qAb(⸘

(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