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🔍 PREVIEW MODE – Only you can see this. Back to Admin EduTek Lesson Notes Shop Print PDF Home › SS › Mathematics › Trigonometric Ratios SS 2 Trigonometric Ratios and Identities Mathematics SS 2 Second Term Introduction to Trigonometry Trigonometry is the branch of mathematics that deals with the relationships between the sides and angles of triangles. It is derived from the Greek words "trigonon" (triangle) and "metron" (measure). 📌 Key Concepts: In a right-angled triangle, there are three sides [Preview only]