已知函数f(x)=psinwx*coswx-cos²wx(p>0,w>0)最大值为1/2,最小正周期为π/21.求p和w的值以及f(x)的解析式.2.若三角形ABC的三条边a,b,c满足a²=bc,a边所对的角为A,求角A的取值范围及函
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![已知函数f(x)=psinwx*coswx-cos²wx(p>0,w>0)最大值为1/2,最小正周期为π/21.求p和w的值以及f(x)的解析式.2.若三角形ABC的三条边a,b,c满足a²=bc,a边所对的角为A,求角A的取值范围及函](/uploads/image/z/1618428-12-8.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dpsinwx%2Acoswx-cos%26sup2%3Bwx%EF%BC%88p%EF%BC%9E0%2Cw%EF%BC%9E0%EF%BC%89%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA1%EF%BC%8F2%2C%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F%E4%B8%BA%CF%80%EF%BC%8F21.%E6%B1%82p%E5%92%8Cw%E7%9A%84%E5%80%BC%E4%BB%A5%E5%8F%8Af%EF%BC%88x%EF%BC%89%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F.2.%E8%8B%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E4%B8%89%E6%9D%A1%E8%BE%B9a%2Cb%2Cc%E6%BB%A1%E8%B6%B3a%26%23178%3B%EF%BC%9Dbc%2Ca%E8%BE%B9%E6%89%80%E5%AF%B9%E7%9A%84%E8%A7%92%E4%B8%BAA%2C%E6%B1%82%E8%A7%92A%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E5%8F%8A%E5%87%BD)
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