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[qquad [" b "=3hat i+hat j-2hat k],[" Fi...

[qquad [" b "=3hat i+hat j-2hat k],[" Find the angles of the triangle whose vertices are "A(0,-1,-2),B(3,1,4)" and "C(5,7,1)" ."]],[" A is the point "(1,3,-2),B" is "(3,-4,1),C" is "(-1,0,2)" .Find the lengths of the sides of the triar "],[ABC" and the cosines of the angles "A" ."B" ."C" ."]

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