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Obtain the angle between A+B and A-B if ...

Obtain the angle between A+B and A-B if `A = 2hati +3hatj and B = hati - 2hatj.`

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Find the angle between the vectors vecA=2hati+3hatj and vecB=-3hati+2hatj .

Find angle between A and B where, (a) A = 2hati and B =- 6 hati (b) A = 6hatj and B =- 2hatk (c) A = (2hati = 3hatj) and B = 4 hatk (d) A = 4hati and B = (-3hati + 3hatj) .

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