Question: Please help mark of zero will be given for stating just the answer. 1. The angle between two vectors a = (1, 1, 2) and

Please help mark of zero will be given for stating just

Please help

mark of zero will be given for stating just the answer. 1. The angle between two vectors a = (1, 1, 2) and b = (-1, 2, k) is 60. Find the value(s) of k

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