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Circles and Trigonometry
infoWhy this? Circle equations unite algebra, geometry, and locus through centres, radii, tangents, and intersections. Trigonometric ratios connect angles and lengths, while identities and equations extend these relationships into exact reasoning about geometric and periodic problems.
scheduleWhy now? Straight-line graphs, quadratics, and equation-solving provide the tools needed to investigate circle intersections and tangents. Earlier algebraic practice supports rearranging and factorising trigonometric expressions, establishing a foundation for Year 13 radians, trigonometric functions, and modelling.
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