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[" If "vec a,vec b,vec c" are unit vecto...

[" If "vec a,vec b,vec c" are unit vectors such that "],[vec a*vec b=0=vec a*vec c" and the angle between "vec b],[" and "bar(c)" is "(pi)/(3)" then the value of "|vec a timesvec b-vec a timesvec c|],[" is "]

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