Paper 2 · Co-ordinate Geometry of the Circle
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Lesson 7 of 9
The circle 7 Find the equation of the tangent to the circle at the point.
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- Find the tangent at a point: radius slope → negative reciprocal → point-slope form
- Find the two tangents parallel to a line using perpendicular distance = radius
- Choose the technique from the wording: 'at the point' vs 'parallel to the line'
- Split the modulus equation into ± cases to get both parallel tangents
Most recent exam questions
- 2025 P2 Q2(a)(ii)
- 2024 P2 Q9(b)
- 2023 P2 Q2(a)(ii) — deferred
- 2023 P2 Q2(b) — deferred
- 2023 P2 Q9(c)(ii)
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