TMUA 2017 Paper 1 Q6 — Worked Solution

P1·Coordinate Geometry·5.5Official · 2017 · Q6

circletangentexternal-pointintercept

A tangent to the circle

x^{2} + y^{2} = 144

passes through the point

(20, 0)

and crosses the positive

y

-axis. What is the value of

y

at the point where the tangent meets the

y

-axis?

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