Express a1 and a2 in terms of I can and j cap using the vectors I j k cap along lie x y z axis respectively.!!!!!
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A=i+j,therefore, |A|=(2)^1/2
B=2j+2k, therefore,|B|=(2^2+2^2)^1/2=(8)^1/2.
Then, |A||B|=(2X8)^1/2=4
Now, if angle between A and B is (theta), then
Cos(theta)=(A.B)/(|A||B|)=(i+j).(2j+2k)/(4)=(2)/(4)=1/2
Therefore, (theta)=cos^-1(1/2)=60 degree.
B=2j+2k, therefore,|B|=(2^2+2^2)^1/2=(8)^1/2.
Then, |A||B|=(2X8)^1/2=4
Now, if angle between A and B is (theta), then
Cos(theta)=(A.B)/(|A||B|)=(i+j).(2j+2k)/(4)=(2)/(4)=1/2
Therefore, (theta)=cos^-1(1/2)=60 degree.
NidhraNair:
this isn't the axis along x y z
wrong answers
delete Karo
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