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168. If û and are unit vectors and 0 is the acute angle
between them, then 2 û x3 is a unit vector for
[2007]
(a) no value of 0
(b) exactly one value

168 If û and are unit vectors and 0 is the acute anglebetween them then 2 û x3 is a unit vector for2007a no value of 0b exactly one value class=

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