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[" Illustration "47.],[" If "bar(A)=hat ...

[" Illustration "47.],[" If "bar(A)=hat i+2hat j+3hat k,vec B=-hat i+hat j+4hat k" and "vec C=3hat i-3hat j-12hat k," then find the angle between the vectors "],[(vec A+vec B+vec c)" and "(bar(A)timesbar(B))" in degrees."]

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