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If hatu and hatv are unit vectors and theta is the acute angle between them, then 2hatuxx3hatv is a unit vector for |
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Answer» exactly TWO value of `THETA` `rArr |2 HATU xx 3 hatv|= 1 rArr 6|hat u| |hatv||sin theta|=1 ` `rArr sin theta = (1)/(6) "" [ because |hatu | = | hatv|=1] ` Since `theta` ios an acute angle, so there is exactly one value of `theta` for which `(2 hatu xx 3hatv)` is unit vector . |
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