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  4. If | veca × vecb|+| veca ⋅ vecb|2=36 and | veca|=3 then | vecb| is equal to

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Q. If $|\vec{a} \times \vec{b}|+|\vec{a} \cdot \vec{b}|^{2}=36$ and $|\vec{a}|=3$ then $|\vec{b}|$ is equal to

KCETKCET 2022Vector Algebra

Solution:

Correct answer is (d) 2