The projection of a vector a= I+ j+ k, on another vector b=3kj+ 3k is:
- √2
- √3
- √4
- none of these
Explanation
Solution
The required projection (assuming it is orthogonal),
= (i + j + k)⋅(3j + 3k)/√(9 + 9)
= 6/3√2 = √2 [Ans]
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