四棱锥S—ABCD中,AB∥CD,BC⊥CD,侧面SAB为等边三角形,AB=BC...四棱锥S—ABCD中,AB∥CD,BC⊥CD,侧面SAB为等边三角形,AB=BC=2,CD=SD=1.(1)证明:SD⊥平面SAB (2)求AB与平面SBC所成角的大小.求第二问
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![四棱锥S—ABCD中,AB∥CD,BC⊥CD,侧面SAB为等边三角形,AB=BC...四棱锥S—ABCD中,AB∥CD,BC⊥CD,侧面SAB为等边三角形,AB=BC=2,CD=SD=1.(1)证明:SD⊥平面SAB (2)求AB与平面SBC所成角的大小.求第二问](/uploads/image/z/7638346-10-6.jpg?t=%E5%9B%9B%E6%A3%B1%E9%94%A5S%E2%80%94ABCD%E4%B8%AD%2CAB%E2%88%A5CD%2CBC%E2%8A%A5CD%2C%E4%BE%A7%E9%9D%A2SAB%E4%B8%BA%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%2CAB%EF%BC%9DBC...%E5%9B%9B%E6%A3%B1%E9%94%A5S%E2%80%94ABCD%E4%B8%AD%2CAB%E2%88%A5CD%2CBC%E2%8A%A5CD%2C%E4%BE%A7%E9%9D%A2SAB%E4%B8%BA%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%2CAB%EF%BC%9DBC%EF%BC%9D2%2CCD%EF%BC%9DSD%EF%BC%9D1.%EF%BC%881%EF%BC%89%E8%AF%81%E6%98%8E%EF%BC%9ASD%E2%8A%A5%E5%B9%B3%E9%9D%A2SAB+%EF%BC%882%EF%BC%89%E6%B1%82AB%E4%B8%8E%E5%B9%B3%E9%9D%A2SBC%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E5%A4%A7%E5%B0%8F.%E6%B1%82%E7%AC%AC%E4%BA%8C%E9%97%AE)
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