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प्रश्न
Choose the correct alternative:
The unit vector parallel to the resultant of the vectors `hat"i" + hat"j" - hat"k"` and `hat"i" - 2hat"j" + hat"k"` is
विकल्प
`(hat"i" - hat"j" + hat"k")/sqrt(5)`
`(2hat"i" + hat"j")/sqrt(5)`
`(2hat"i" - hat"j" + hat"k")/sqrt(5)`
`(2hat"i" - hat"j")/sqrt(5)`
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उत्तर
`(2hat"i" - hat"j")/sqrt(5)`
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संबंधित प्रश्न
Which of the following represents direction cosines of the line :
(a)`0,1/sqrt2,1/2`
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(c)`0,sqrt3/2,1/2`
(d)`1/2,1/2,1/2`
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(A) `0,1/sqrt2,-1/sqrt2`
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(C) `1,1/sqrt2,1/sqrt2`
(D) `0,-1/sqrt2,1/sqrt2`
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