求下列函数的定义域:y=根号(2sinx^2+cosx-1)(1)y=根号(2sinx^2+cosx-1)(2)y=根号[log2(1/sinx)-1](3)y=根号(sinx)+1/根号(16-x^2)
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![求下列函数的定义域:y=根号(2sinx^2+cosx-1)(1)y=根号(2sinx^2+cosx-1)(2)y=根号[log2(1/sinx)-1](3)y=根号(sinx)+1/根号(16-x^2)](/uploads/image/z/1043788-4-8.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%87%BD%E6%95%B0%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%EF%BC%9Ay%3D%E6%A0%B9%E5%8F%B7%282sinx%5E2%2Bcosx-1%29%281%EF%BC%89y%3D%E6%A0%B9%E5%8F%B7%EF%BC%882sinx%5E2%2Bcosx-1%29%282%29y%3D%E6%A0%B9%E5%8F%B7%5Blog2%281%2Fsinx%29-1%5D%283%29y%3D%E6%A0%B9%E5%8F%B7%EF%BC%88sinx%29%2B1%2F%E6%A0%B9%E5%8F%B7%EF%BC%8816-x%5E2%29)
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