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Vector vec a , vec b and vec c are suc...

Vector ` vec a , vec b` and ` vec c` are such that ` vec a+ vec b+ vec c= vec0` and `|a|=3,| vec b|=5` and `| vec c|=7.` Find the angle between ` vec a` and ` vec b` .

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
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