三棱柱ABC-A1B1C1中,底面边长和侧棱长相等,∠BAA1=∠CAA1=60°,则异面直线AB1与BC所成的角的余弦值三棱柱ABC-A1B1C1中,底面边长和侧棱长相等,∠BAA1=∠CAA1=60°,则异面直线AB1与BC1所成的角的余弦值谔
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![三棱柱ABC-A1B1C1中,底面边长和侧棱长相等,∠BAA1=∠CAA1=60°,则异面直线AB1与BC所成的角的余弦值三棱柱ABC-A1B1C1中,底面边长和侧棱长相等,∠BAA1=∠CAA1=60°,则异面直线AB1与BC1所成的角的余弦值谔](/uploads/image/z/7842202-34-2.jpg?t=%E4%B8%89%E6%A3%B1%E6%9F%B1ABC-A1B1C1%E4%B8%AD%2C%E5%BA%95%E9%9D%A2%E8%BE%B9%E9%95%BF%E5%92%8C%E4%BE%A7%E6%A3%B1%E9%95%BF%E7%9B%B8%E7%AD%89%2C%E2%88%A0BAA1%3D%E2%88%A0CAA1%3D60%C2%B0%2C%E5%88%99%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFAB1%E4%B8%8EBC%E6%89%80%E6%88%90%E7%9A%84%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E4%B8%89%E6%A3%B1%E6%9F%B1ABC-A1B1C1%E4%B8%AD%2C%E5%BA%95%E9%9D%A2%E8%BE%B9%E9%95%BF%E5%92%8C%E4%BE%A7%E6%A3%B1%E9%95%BF%E7%9B%B8%E7%AD%89%2C%E2%88%A0BAA1%3D%E2%88%A0CAA1%3D60%C2%B0%2C%E5%88%99%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFAB1%E4%B8%8EBC1%E6%89%80%E6%88%90%E7%9A%84%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E8%B0%94)
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