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Which of the following pairs cannot be orthogonal?
(a) (3, 5), (- 5, 3) (b) (3, 2), (- 2, 3) (c) (4, 5), (- 4, 5) (d) (6, - 7), (7, 6)
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- for pairs to be orthogonal, a/b -b/a should be co ordinates
here 3/5 -5/3 are orthogonal
3/2 -2/3 are orthogonal
6/-7 7/6 are orthogonal
hence ans is (c)... - 12 years agoHelpfull: Yes(3) No(0)
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