CUET · MATHS · PYQ PAPER 2023
The projection of the vector \(\hat{i}+\hat{j}+\hat{k}\) on the vector \(\hat{j}\) is:
- A 0
- B 1
- C 2
- D -1
Answer & Solution
Correct Answer
(B) 1
Step-by-step Solution
Detailed explanation
Projection \( = \frac{\vec{a} \cdot \vec{b}}{|\vec{b}|} \) \( = \frac{(\hat{i}+\hat{j}+\hat{k}) \cdot (\hat{j})}{|\hat{j}|} \) \( = \frac{1}{1} \) \( = 1 \)
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