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If the vectors a=hati-hatj+2hatk, b=2hati+4hatj+hatk and c=lambdahati+hatj+mu hatk are mutually orthogonal, then (lambda, mu) is equal to |
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Answer» `(-3, 2)` `a.B = 2 - 4 + 2 =0` `a .c = lambda - 1 + 2 mu = 0 "…."(i)` and `b .c = 2lambda + 4 +mu = 0 "….."(ii)` On solvingEqs. (i) and (ii), we get `mu = 2` and `lambda = - 3` `:. (lambda, mu) = (-3,2)` |
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