if a=b then a+b(vector) and a-b(vector) between angle
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angle between them is 90 degrees hope u understand
ashishmangal:
why
at middle of step I get (|A|)^2-(|B|)^2 = cos theta said per condition a=b so it become 0 and cos90 is 0
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pls check my solution
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you can refer to this image for answer and don't forget to mark it as brainliest
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