Q. 22

What are the direction cosines of the vector

Answer :

Given : A vector


To find : Direction cosines of the vector


Formula used : If a vector is l + m + n then direction cosines are given by , ,


Here l = 2 , m = 1 , n = -2


Direction cosines of the line with direction ratios 2, 1, -2 is


, ,


= , , = , ,


= , ,


Direction cosines of the vector is , ,


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