y=34.8/sinx+8.5/cosx,请问当x为多大时y的值最大?(x为锐角)
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![y=34.8/sinx+8.5/cosx,请问当x为多大时y的值最大?(x为锐角)](/uploads/image/z/11829571-43-1.jpg?t=y%3D34.8%2Fsinx%2B8.5%2Fcosx%2C%E8%AF%B7%E9%97%AE%E5%BD%93x%E4%B8%BA%E5%A4%9A%E5%A4%A7%E6%97%B6y%E7%9A%84%E5%80%BC%E6%9C%80%E5%A4%A7%3F%EF%BC%88x%E4%B8%BA%E9%94%90%E8%A7%92%EF%BC%89)
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