化简1+sinθ-cosθ/1+sinθ+cosθ详细过程.
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化简1+sinθ-cosθ/1+sinθ+cosθ详细过程.
化简1+sinθ-cosθ/1+sinθ+cosθ详细过程.
化简1+sinθ-cosθ/1+sinθ+cosθ详细过程.
应用公式:
sina=2sina/2*cosa/2
cosa=2(cosa/2)^2-1=1-2(sina/2)^2
(1+sinθ-cosθ0/(1+sinθ+cosθ)
=(1+2sinθ/2*cosθ/2-1+2sin^2θ/2)/(1+2sinθ/2*cosθ/2+2cos^2θ/2-1)
=(2sinθ/2*cosθ/2+2sin^2θ/2)/(2sinθ/2*cosθ/2+2cos^2θ/2)
=2sinθ/2(sinθ/2+cosθ/2)/2cosθ/2(sinθ/2+cosθ/2)
=sinθ/2/cosθ/2
=tanθ/2
化简:1+sinθ+cosθ+2sinθcosθ /1+sinθ+cosθ
f(θ)=【sinθcosθ/(sinθ+cosθ+1)】+sinθcosθ化简
化简[sinθ(1+sinθ)+cosθ(1+cosθ)]*[sinθ(1-sinθ)+cosθ(1-cosθ)]-sin2θ
化简1+cosθ-sinθ化简(1+cosθ-sinθ)/(1-cosθ-sinθ)+(1-cosθ-sinθ)/(1+cosθ-sinθ)(1+cosθ-sinθ)/(1-cosθ-sinθ)+(1-cosθ-sinθ)/(1+cosθ-sinθ)
求证sinθ/(1+cosθ)+(1+cosθ)/sinθ=2/sinθ
化简(sinθ-cosθ)/(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ
化简【1+sinθ-cosθ/1+sinθ+cosθ】+cot(θ/2)
化简1+sinθ-cosθ/1+sinθ+cosθ详细过程.
化简(1+sinθ+cosθ)/(1+sinθ-cosθ)谢谢!急!今晚作业!务必!
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