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May 11th, 2009, 06:25 AM   #1
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help please ... tangent to hyperbola ... calculus

Find tangents which goes through point (-2;2) to the hyperbola (x^2)/4 - y^2 = 1 ???
I dont know how to solve this because the point (-2;2) is not on hyperbola???
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May 11th, 2009, 11:04 AM   #2
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One of several methods of doing this is to find the equation of the tangent through any point (2sec(t), tan(t)) on the hyperbola, and then determine the particular cases where the tangent contains the point (-2, 2).
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