Question

the sum and difference of two vectors are equal in magnitude the angle between the vectors is??
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Answer 1

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Answer

• The magnitude of sum of two vectors is equal to the magnitude of difference the two vectors, the angle between these vectors is 90

$(a \: + \: b {)}^{2} = {a}^{2} + {b}^{2} + 2 \: a.b \\ (a \: - \: b {)}^{2} = {a}^{2} + {b}^{2} - 2 \: a.b$

So a . b = 0

90