Khan Academy on a Stick
IIT JEE Circle Hyperbola Common Tangent Part 5
2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 5
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2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 5
If the above player doesn't work, you can try this direct link.