Lesson 2

Solving Trigonometric Problems

🔹 What Does Problem Solving Mean in Trigonometry?

In trigonometry, problem solving means:

• Finding unknown sides or angles

• Using trigonometric ratios correctly

• Applying identities and standard values

🔹 Steps to Solve Trigonometric Problems

1️⃣ Draw or imagine a right-angled triangle
2️⃣ Identify the given angle
3️⃣ Identify known and unknown sides
4️⃣ Choose the correct ratio (sin, cos, or tan)
5️⃣ Substitute values and solve

🔹 Example (Conceptual)

If one side and an angle are given:

• Decide which ratio connects them

• Substitute values

• Calculate the answer

(No formulas beyond sin, cos, tan are needed.)

🔹 Common Mistakes to Avoid

• Choosing the wrong ratio

• Mixing up opposite and adjacent sides

• Using incorrect standard values

✅ Lesson 2 Key Takeaway

✔ Choose the correct trigonometric ratio
✔ Use standard values correctly
✔ Follow steps carefully for correct answers