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Module 6: Trigonometry – Leaving Cert Higher Level Maths This is a big module — and for good reason. Trigonometry appears across multiple questions on both Paper 1 and Paper 2, and your ability to apply these concepts confidently can have a major impact on your final grade. In this module, you’ll move far beyond Junior Cert basics. You’ll learn how to apply trigonometric rules and identities in both 2D and 3D contexts, explore the concept of radians, and gain the skills needed to handle trig equations and graphs — including the more challenging related trig graphs. Here’s what we’ll cover: - Right-angled trigonometry and 3D trigonometry - Area of a triangle using trigonometric methods - Introducing radians and understanding angular measure - The Sine Rule, including the ambiguous case - The Cosine Rule and how to apply it in problem-solving - Trig graphs and how to interpret them - Related trig graphs and how transformations affect the curve - Solving trig equations - Trigonometric identities Throughout this module, we’ll break each topic down into clear steps, with video lessons, exam-style practice, printable notes, and worked examples. If you’re a member, we’ll also tackle key problems in our live grinds, where you’ll get real-time feedback and exam tips. Trigonometry is one of the most heavily tested and interconnected topics on the course. If you invest the time now, you’ll be setting yourself up to gain solid marks across multiple exam questions.