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Let T1, T2 and be two tangents drawn fro...

Let `T_1, T_2` and be two tangents drawn from (-2, 0) onto the circle `C:x^2+y^2=1`. Determine the circles touching C and having `T_1,T_2` as their pair of tangents. Further, find the equations of all possible common tangents to these circles when taken two at a time

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