vectors-m

Question: If the moduli of a and b are equal and angle between them is ${{120}^{o}}$ and $\mathbf{a}\,.\,\mathbf{b}=-\,8,$ then | a | is equal to



1) – 5
2) – 4
3) 4
4) 5
Solution: Explanation: No Explanation
Scalar Product Dot Product

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