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Homework Statement
Two vectors A ⃗ and B ⃗ are such that A ⃗+B ⃗=C ⃗ and A2+B2=C2 .You need to find the angle θ between the positive directions of A ⃗ and B ⃗.
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Two vectors A ⃗ and B ⃗ are such that A ⃗+B ⃗=C ⃗ and A2+B2=C2 .You need to find the angle θ between the positive directions of A ⃗ and B ⃗.
Discussion
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Hint: consider
[tex](\vec A + \vec B)^2 = (\vec A + \vec B) \cdot (\vec A + \vec B)[/tex]
[tex](\vec A + \vec B)^2 = (\vec A + \vec B) \cdot (\vec A + \vec B)[/tex]
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