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If a ,b ,c are the lengths of sides, ...

If `a ,b ,c` are the lengths of sides, `B C ,C A` and `A B` of a triangle `A B C ,` prove that ` vec B C+ vec C A+ vec A B= vec O` and deduce that `a/(sinA)=b/(sinB)=c/(sinC)dot`

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RD SHARMA-VECTOR OR CROSS PRODUCT -Solved Examples And Exercises
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