circle

Question: The length of common chord of the circles ${{(x-a)}^{2}}+{{y}^{2}}={{a}^{2}}$ and ${{x}^{2}}+{{(y-b)}^{2}}={{b}^{2}}$ is

1) $2\sqrt{{{a}^{2}}+{{b}^{2}}}$

2) $\frac{ab}{\sqrt{{{a}^{2}}+{{b}^{2}}}}$

3) $\frac{2ab}{\sqrt{{{a}^{2}}+{{b}^{2}}}}$

4) None of these

Solution:

Explanation: No Explanation

Chord of contact of tangent Pole and Polar

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