已知sin α是方程5x²-7x-6=0的根,求〔sin(α+3/2π)sin(3/2π-α)*tan²(2π-α)〕/〔cos(π/2-α)cos(π/2 +α)〕的值
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![已知sin α是方程5x²-7x-6=0的根,求〔sin(α+3/2π)sin(3/2π-α)*tan²(2π-α)〕/〔cos(π/2-α)cos(π/2 +α)〕的值](/uploads/image/z/3738501-45-1.jpg?t=%E5%B7%B2%E7%9F%A5sin+%CE%B1%E6%98%AF%E6%96%B9%E7%A8%8B5x%26%23178%3B-7x-6%3D0%E7%9A%84%E6%A0%B9%2C%E6%B1%82%E3%80%94sin%EF%BC%88%CE%B1%2B3%2F2%CF%80%EF%BC%89sin%EF%BC%883%2F2%CF%80-%CE%B1%EF%BC%89%2Atan%26%23178%3B%EF%BC%882%CF%80-%CE%B1%EF%BC%89%E3%80%95%2F%E3%80%94cos%EF%BC%88%CF%80%2F2-%CE%B1%EF%BC%89cos%EF%BC%88%CF%80%2F2+%2B%CE%B1%EF%BC%89%E3%80%95%E7%9A%84%E5%80%BC)
已知sin α是方程5x²-7x-6=0的根,求〔sin(α+3/2π)sin(3/2π-α)*tan²(2π-α)〕/〔cos(π/2-α)cos(π/2 +α)〕的值
已知sin α是方程5x²-7x-6=0的根,求〔sin(α+3/2π)sin(3/2π-α)*tan²(2π-α)〕/〔cos(π/2-α)cos(π/2 +α)〕的值
已知sin α是方程5x²-7x-6=0的根,求〔sin(α+3/2π)sin(3/2π-α)*tan²(2π-α)〕/〔cos(π/2-α)cos(π/2 +α)〕的值