admin百科知識 2022-02-13 18:27:39 化簡(sinθ-cosθ)(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ化簡(sinθ-cosθ)/(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ網友廻答：匿名網友選D(sinθ-cosθ)/(tanθ-1)=(sinθ-cosθ)/(sinθ/cosθ-1)=(sinθ-cosθ)/[(sinθ-cosθ)/cosθ]=1/(1/cosθ)=cosθ db標簽 生活常識_百科知識_各類知識大全»化簡(sinθ-cosθ)(tanθ-1)A.tanθ B.sinθ C.-sinθ D.cosθ
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