1.

given\vec{p}=\vec{z}+a \vec{j}+\vec{k}\vec{q}=\vec{3 i}-\vec{j}-\vec{k}are perpendicular calculate the value of c

Answer»

perpendicular soP●Q=6-a-1=05-a=0so a=5

if there are at 60 degrees what result



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