Question: Let a(t)= <2,-4,3>t + <1,-3,2> and b(u)= u + . Find the acute angle (in degrees) between the lines:

Let a(t)=<2,-4,3>t +<1,-3,2> and b(u)=<-1,-3,-2>u +<-9,6,-5>. Find the acute angle (in degrees) between the lines:

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