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If veca,vecb,vecc are three vectors such...

If `veca,vecb,vecc` are three vectors such that `veca+2vecb+vecc=vec0` and `|veca|=3,|vecb|=4,|vecc|=7`, find the angle between `veca` and `vecb`.

Text Solution

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The correct Answer is:
`(2pi)/3`
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