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[" let "vec a=2hat i+hat j-2hat k" and "vec b=hat i+hat j." If "vec c" is a "],[" vector such that "vec a*vec c=|vec c|,|vec c-vec a|=2sqrt(2)" and "],[" the angle between "(vec a timesvec b)" and "vec c" is "30^(@)" ,then "],[|(vec a timesvec b)timesvec c|" is equal to "]

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