Question: Tangent line to a circle through an external point

November 20 2012 stupidstudent 0
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The circle S with center at the origin and radius 2 is given by the equation x2 + y2 = 4
The circle S have two tangents passing through the point (4, 1). Find the equation for each of them.

Can any one help us realy stuck on this one, dont have any good answers.

Thx for fast help

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