Advertisements
Advertisements
प्रश्न
Let the vectors `veca` and `vecb` be such that `|veca| = 3` and `|vecb| = sqrt2/3`, then `veca xx vecb` is a unit vector, if the angle between `veca` and `vecb` is ______.
पर्याय
`pi/6`
`pi/4`
`pi/3`
`pi/2`
MCQ
रिकाम्या जागा भरा
Advertisements
उत्तर
Let the vectors `veca` and `vecb` be such that `|veca| = 3` and `|vecb| = sqrt2/3`, then `veca xx vecb` is a unit vector, if the angle between `veca` and `vecb` is `underline(pi/4)`
Explanation:
`|veca| = 3, |vecb| = sqrt2/3`
`|veca xx vecb| = 1`
`|veca||vecb||sinthetahatn| = 1`
`|veca||vecb||sintheta| = 1`
`3 xx sqrt2/2 xx sintheta = 1`
`sintheta = 1/sqrt2`
`theta = pi/4`
The correct option is `pi/4`.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
