lesson 2

1. Revision of trignometric concepts

Revision of Trigonometry Concepts

🔹 Why Revision is Important

Revision helps to:

• Recall important formulas

• Avoid common mistakes

• Improve confidence before assessment

🔹 Concepts to Revise

1️⃣ Trigonometric Ratios

• sin θ = Opposite / Hypotenuse

• cos θ = Adjacent / Hypotenuse

• tan θ = Opposite / Adjacent

2️⃣ Trigonometric Identities

• sin²θ + cos²θ = 1

• tan θ = sin θ / cos θ

• Reciprocal identities

3️⃣ Standard Values

• sin, cos, tan of 0°, 30°, 45°, 60°, 90°

🔹 Common Mistakes to Avoid

• Confusing opposite and adjacent sides

• Choosing the wrong ratio

• Using incorrect standard values

✅ Lesson 2 Key Takeaway

✔ All core concepts are revised
✔ Common errors are identified
✔ Learners are ready for assessment