The projection of a vector- r - 3 - - - - 2 k- - on the x - y plane has magnitude

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Dot Product of Two Vectors

The projectio...

Question

The projection of a vector, $\to r = 3^i +^j + 2^k$ , on the $x - y$ plane has magnitude

3

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4

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\sqrt{14}

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\sqrt{10}

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Solution

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Similar questions

\to r = 3^i +^j + 2^k

r . (2^i -^j + 2^k) = 3

r . (3^i - 6^j + 2^k) = 4

3^i +^j + 2^k

X Y

3^i + 2^j - 5^k

2^i -^j + 2^k

r . (2^i -^j + 2^k) = 3

r . (3^i - 6^j + 2^k) = 4

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