已知O<α<π,且sinα,cosα是方程5x2-x+m=0的两个根,求:(1)实数没的值;(2)tanα 的值;(3)根号下1-cosα/1+cosα-根号下1+cosα/1-cosα的值.
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![已知O<α<π,且sinα,cosα是方程5x2-x+m=0的两个根,求:(1)实数没的值;(2)tanα 的值;(3)根号下1-cosα/1+cosα-根号下1+cosα/1-cosα的值.](/uploads/image/z/445790-38-0.jpg?t=%E5%B7%B2%E7%9F%A5O%EF%BC%9C%CE%B1%EF%BC%9C%CF%80%2C%E4%B8%94sin%CE%B1%2Ccos%CE%B1%E6%98%AF%E6%96%B9%E7%A8%8B5x2-x%2Bm%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%A0%B9%2C%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E5%AE%9E%E6%95%B0%E6%B2%A1%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%882%EF%BC%89tan%CE%B1+%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%883%EF%BC%89%E6%A0%B9%E5%8F%B7%E4%B8%8B1-cos%CE%B1%2F1%2Bcos%CE%B1-%E6%A0%B9%E5%8F%B7%E4%B8%8B1%2Bcos%CE%B1%2F1-cos%CE%B1%E7%9A%84%E5%80%BC.)
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