physics
posted by qwertyuiop .
the angle between i +j and i is
a. pi/6
b. pi/2
c. pi/3
d. pi/2

physics 
Steve
i+j is at pi/4
i is at 0
I don't see a correct choice.
Now, if you are asking about +j and +i, that would be pi/2 
physics 
qwertyuiop
k thx a lot
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