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Find the value of lambda so that the vectors veca and vecb are perpendicular to each other. veca = hati+hatj+lambdahatk, vecb = 4hati-3hatk

Answer»

SOLUTION :If `veca` and `vecb` are PERPENDICULAR then `veca.vecb = 0`
`implies (hati+hatj+lambdahatk).(4hati-3hatk) = 0`
`implies = 4+0-3lambda = 0 implies LAMBDA = 4/3`


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