化简(sinθ-cosθ)/(tanθ-1)
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化简(sinθ-cosθ)/(tanθ-1)化简(sinθ-cosθ)/(tanθ-1)化简(sinθ-cosθ)/(tanθ-1)(sinθ-cosθ)/(tanθ-1)分子分母同乘以cosθ:=c
化简(sinθ-cosθ)/(tanθ-1)
化简(sinθ-cosθ)/(tanθ-1)
化简(sinθ-cosθ)/(tanθ-1)
(sinθ-cosθ)/(tanθ-1)
分子分母同乘以cosθ:
= cosθ(sinθ-cosθ)/(sinθ-cosθ)
= cosθ
负的COS瑟塔
=sinθ-cosθ)/(sinθ/cosθ-1)
=(sinθ-cosθ)/[(sinθ-cosθ)/cosθ]
=cosθ
原式=[-sinθ/(-tanθ)][1/(-cot θ)][cosθ/(-sinθ)]-sinθ =cos θsin θ/(cos θsinθ)-sinθ =sinθ-sinθ =0
化简(sinθ-cosθ)/(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ
化简[(tanθ*sinθ)/(tanθ-1)] +[ cosθ/(1-tanθ) ]
化简:cos^2θcotθ+sin^2θtanθ+2cosθsinθ
化简(sinθ-cosθ)/(tanθ-1)
化简tanθ-1分之sinθ-cos等于
已知sinθcosθ>0 sinθtanθ
若兀/4tanθB.cosθ>tanθ>sinθC.sinθ>tanθ>cosθD.tanθ>sinθ>cosθ
化简 1、cosθ*tanθ 2、 (1-sinθ)(1+sinθ)
cos θ/(1-tan θ)怎样化成cos θ/[(cosθ-sinθ)/cosθ]
化简:1.cosθtanθ 2.2cosα²-1/1-2sin²α
证明:tanθsinθ = secθ-cosθ )
已知tanθ=2则sinθ+sinθcosθ-2cosθ=?
1/cosθ*sinθ等于tanθ吗
tanθ=2求sinθcosθ=?
1/tanθ + sinθ/1+cosθ
求tanθ=sinθ/cosθ的证明
cosθ=t,求sinθ,tanθ
化简:cosθtanθ