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If veca,vecb,vecc are such that veca.vecb = veca.vecc then show that veca = vec0 or vecb = vecc or veca is perpendicular to vecb.vecc.

Answer»

Solution :GIVEN `veca.vecb` = `veca,VECC`
`impliesveca.(vecb-vecc)` = 0
`IMPLIES veca` = 0 or `vecb-vecc` = 0 or `vecabot(vecb-vecc)`
`implies veca` = 0 or `vecb-vecc` or `vecabot(vecb-vecc)


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