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In 1, m and n are direction cosine of a vector, then: (a) 12-m-n=1 (c) 12+ m -n = 1 2 (b) 12-m+n =
In 1, m and n are direction cosine of a vector, then: (a) 12-m-n=1 (c) 12+ m -n = 1 2 (b) 12-m+n = 1 (d) 1+ m + n = 1
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