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All India Engineering / Architecture Entrance Examination (AIEEE) CBSE Guess > AIEEE > AIEEE Papers > 2009 > Maths AIEEE 2009 Maths Q. 19. The projections of a vector on the three coordinate axis are 6, –3, 2 respectively. The direction cosines of the vector are
Sol.: Direction ratios are: 6, –3, 2 Direction cosines are: Answer: (4) Q. 20. From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on a shelf so that the dictionary is always in the middle. Then the number of such arrangements is
Sol: Q. 21.
Sol: Answer: (2)
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