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Applications of Cross Product

The magnitude...

Question

The magnitude of two vectors $\to A$ and $\to B$ are $5$ and $4$ units respectively and the angle between them is $30^{o}$ . Find value of $\to A . \to B$

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Solution

$\to A d o t \to B = A B c o s θ = 5 \times 4 c o s 30^{0} = 10 \sqrt[2]{3}$ $

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