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^{-7}T in the Y+ direction, what is the magnetic firld at

A(1,0,0)

B(0,1,0)

C(-1,0,0)

i know that my field at each point must be the sum of the fields at the points, so it will be 2*10

^{-7}T*Y + the field of the wire,

what equation cani use to find the field of an endless wire??