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[" 13.Let "a=2hat i+hat j-2hat k" and "v...

[" 13.Let "a=2hat i+hat j-2hat k" and "vec b=hat i+hat j" .Let "vec c" be a "],[" vedorsuch that "(1)/(c)-vec a'|=3,|(vec a timesvec b)timesvec c|=3" and "],[" the angle between "vec c" and "vec a timesvec b" be "30^(@)" .Then "vec a*vec c],[" is equal to ":],[[" (1) "(1)/(8)," (2) "(25)/(8)],[" (3) "2," (4) "5]]

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