Chapter 8: Introduction to Trigonometry (Summary)
This chapter introduces the concept of trigonometry, which is the study of the relationships between angles and sides of right-angled triangles.
Key topics covered include:
Understanding Trigonometric Ratios – Definitions of sine (sin), cosine (cos), tangent (tan), and their reciprocals: cosecant (cosec), secant (sec), and cotangent (cot).
Trigonometric Ratios of Specific Angles – Values of these ratios at 0°, 30°, 45°, 60°, and 90°.
Trigonometric Identities – Fundamental identities like:
Application of Trigonometric Ratios – Solving problems using these ratios to find unknown sides or angles in right-angled triangles.
Use of Tables – Using trigonometric tables to find values when calculators are not used.
