向量a等于(cos阿尔法,sin阿尔法)向量b等于(cos贝塔,sin贝塔)零小于贝塔小于阿尔法小于180度.(1)/a-b/等于根号2 求证a垂直于b (2)设c等于(0,1),a加b等于c 求阿尔法和贝塔的值.
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![向量a等于(cos阿尔法,sin阿尔法)向量b等于(cos贝塔,sin贝塔)零小于贝塔小于阿尔法小于180度.(1)/a-b/等于根号2 求证a垂直于b (2)设c等于(0,1),a加b等于c 求阿尔法和贝塔的值.](/uploads/image/z/4532697-9-7.jpg?t=%E5%90%91%E9%87%8Fa%E7%AD%89%E4%BA%8E%EF%BC%88cos%E9%98%BF%E5%B0%94%E6%B3%95%2Csin%E9%98%BF%E5%B0%94%E6%B3%95%EF%BC%89%E5%90%91%E9%87%8Fb%E7%AD%89%E4%BA%8E%EF%BC%88cos%E8%B4%9D%E5%A1%94%2Csin%E8%B4%9D%E5%A1%94%EF%BC%89%E9%9B%B6%E5%B0%8F%E4%BA%8E%E8%B4%9D%E5%A1%94%E5%B0%8F%E4%BA%8E%E9%98%BF%E5%B0%94%E6%B3%95%E5%B0%8F%E4%BA%8E180%E5%BA%A6.%EF%BC%881%EF%BC%89%2Fa-b%2F%E7%AD%89%E4%BA%8E%E6%A0%B9%E5%8F%B72+%E6%B1%82%E8%AF%81a%E5%9E%82%E7%9B%B4%E4%BA%8Eb+%282%29%E8%AE%BEc%E7%AD%89%E4%BA%8E%EF%BC%880%2C1%EF%BC%89%2Ca%E5%8A%A0b%E7%AD%89%E4%BA%8Ec+%E6%B1%82%E9%98%BF%E5%B0%94%E6%B3%95%E5%92%8C%E8%B4%9D%E5%A1%94%E7%9A%84%E5%80%BC.)
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