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Multiplication with Vectors

Write the num...

Question

Write the number of vector of unit length perpendicular to both the vectors $\to a = 2^i +^j + 2^k$ and $\to b =^j +^k$

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Solution

Number of vector of unit length perpendicular to both vector $= 2$
Which are in the direction of the cross products $a$ with $b$ and $b$ with $a$

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