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Sticky Note
The projection of a vector a= I+ j+ k, on another vector b=3kj+ 3k is:
  1. √2
  2. √3
  3. √4
  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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