已知sinθ和cosθ是方程5x^2-7x+m=0的两根(1)求m的值(2)求(sinθ/(1-cotθ))+(cosθ/(1-tanθ))的值
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已知sinθ和cosθ是方程5x^2-7x+m=0的两根(1)求m的值(2)求(sinθ/(1-cotθ))+(cosθ/(1-tanθ))的值
已知sinθ和cosθ是方程5x^2-7x+m=0的两根
(1)求m的值
(2)求(sinθ/(1-cotθ))+(cosθ/(1-tanθ))的值
已知sinθ和cosθ是方程5x^2-7x+m=0的两根(1)求m的值(2)求(sinθ/(1-cotθ))+(cosθ/(1-tanθ))的值
sinθ+cosθ=7/5 sinθcosθ=m/5
1=(sinθ+cosθ)^2-2sinθcosθ
∴1=49/25-2m/5
2m/5=24/25
m=12/5