if the circle C1 touches x-axis and the line y = x tanθ (tan θ >0) in frist quadrant and circle C2 touches the line y = x tan θ, y - axis and circle C1 in such a way that ratio of radius of C1 and C2 is 2:1 then the value of tan θ2 is given by:
1. -3 + √172
2. 3 + √172
3. -3 - √172
4. 3 - √172
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