Question 20

Mathematics Scalar and Vector Products Hard

Let&nbsp;<span class="math-tex">\(\rm \vec a =\hat i +\hat j +\hat k,\; \vec b =\hat i -\hat j + \hat k\)</span>&nbsp;and c = î - ĵ - k̂ be three vectors. A vector&nbsp;<span class="math-tex">\(\rm \vec v\)</span>&nbsp;in the plane of&nbsp;<span class="math-tex">\(\rm \vec a\)</span>&nbsp;and&nbsp;<span class="math-tex">\(\rm \vec b\)</span>&nbsp;whose projection on&nbsp;<span class="math-tex">\(\rm \frac {\vec c} {|\vec c|}\)</span>&nbsp;is&nbsp;<span class="math-tex">\(\frac 1 {\sqrt 3},\)</span>&nbsp;is

(A) 3î - ĵ + 3k̂
(B) î - 3ĵ + 3k̂
(C) 5î - 2ĵ + 5k̂
(D) 2î - ĵ + 3k̂
View Dynamic Solution & Explanation
Correct Solution: Option A

Step-by-step Solution:

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