化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]

来源：学生作业帮助网编辑：作业帮时间：2024/04/30 04:08:43

化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]
化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]

化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]
原式=(cosθ-tan²θcosθ)／(1-tanθ)
=cosθ(1+tanθ)(1-tanθ)／(1-tanθ)
=cosθ+sinθ

[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]
=[(sinθ/cosθ*sinθ)/(sinθ/cosθ-1)] +[ cosθ/(1-sinθ/cosθ) ]
=[sin^2θ/(sinθ-cosθ)] +[ cos^2θ/(cosθ-sinθ) ]
=[sin^2θ/(sinθ-cosθ)] -[ cos^2θ/(sinθ-cosθ...

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化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ] 求证 tanθ(1+sinθ )+sinθ /tanθ (1+sinθ )-sinθ =tanθ+sinθ/tanθsinθ 化简tan(45-θ)×tan(45+θ) 化简(sinθ-cosθ)/(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ 化简(sinθ-cosθ)/(tanθ-1) 化简tanθ-1分之sinθ-cos等于若兀/4tanθB.cosθ>tanθ>sinθC.sinθ>tanθ>cosθD.tanθ>sinθ>cosθ 求证：tan²θ-sin²θ=tan²θ·sin²θ 求证tan^2θ-sin^2θ=tan^2θsin^2θ 已知sinθcosθ>0 sinθtanθ 化简1-sin2θ/cos²θ-sin²θ=1-tanθ/1+tanθ 化简:cos^2θcotθ+sin^2θtanθ+2cosθsinθ 化简 1、cosθ*tanθ 2、（1-sinθ）（1+sinθ）化简 tan2θ-tanθ/1+tan2θtanθ 若tanθ+1/tanθ=3则sinθ·cosθ= 三角函数：1+tan²θ=tanθ/sinθcosθ [sin(180°)-θsin(270°- θ)tan(90°- θ)]/[sin(90°+ θ)tan(270°- θ)tan(360°- θ)] 化简:cosθtanθ