函数F(x)=cos2x+2sinx的最小值和最大值分别为多少?(1/2)在锐角三角形ABC中,角A.B.C所对的边分别为a.b.向量P=(1-sinA,12/7),向量Q=(cos2A,2sinA),且(2/2)向量P平行于向量Q 一求sinA的值?二若b=2,三角
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![函数F(x)=cos2x+2sinx的最小值和最大值分别为多少?(1/2)在锐角三角形ABC中,角A.B.C所对的边分别为a.b.向量P=(1-sinA,12/7),向量Q=(cos2A,2sinA),且(2/2)向量P平行于向量Q 一求sinA的值?二若b=2,三角](/uploads/image/z/1655207-71-7.jpg?t=%E5%87%BD%E6%95%B0F%28x%29%3Dcos2x%2B2sinx%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E5%92%8C%E6%9C%80%E5%A4%A7%E5%80%BC%E5%88%86%E5%88%AB%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%281%2F2%29%E5%9C%A8%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%EF%BC%8C%E8%A7%92A.B.C%E6%89%80%E5%AF%B9%E7%9A%84%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa.b.%E5%90%91%E9%87%8FP%3D%281%EF%BC%8DsinA%EF%BC%8C12%2F7%29%EF%BC%8C%E5%90%91%E9%87%8FQ%3D%28cos2A%EF%BC%8C2sinA%29%EF%BC%8C%E4%B8%94%282%2F2%29%E5%90%91%E9%87%8FP%E5%B9%B3%E8%A1%8C%E4%BA%8E%E5%90%91%E9%87%8FQ+%E4%B8%80%E6%B1%82sinA%E7%9A%84%E5%80%BC%EF%BC%9F%E4%BA%8C%E8%8B%A5b%3D2%EF%BC%8C%E4%B8%89%E8%A7%92)
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