Mathematics — Trigonometry

Exam board: WJEC  |  Back to subjects

Board-Specific Note

Similar Pure/Applied split; pure content overlaps heavily with AQA/Edexcel.

Learning Objectives

• Use sine and cosine rules
• Sketch trig graphs
• Solve trig equations

Key Points

• SOH CAH TOA
• sin²θ + cos²θ = 1
• Graph period and amplitude

Lesson Plan (50 minutes)

1. Starter (5 min): Recall prior knowledge of trigonometry with quick questions.
2. Teaching (15 min): Work through each of the learning objectives, explaining principles step by step.
3. Key points review (5 min): Revisit the key points together, confirming understanding.
4. Worked example (10 min): Model the example question: Solve sinθ = √3/2 for 0 ≤ θ < 2π. Solution: θ = π/3, 2π/3
5. Practice (10 min): Students attempt the practice questions independently; circulate and support.
6. Plenary (5 min): Review answers and address misconceptions.

Homework

• Solve cosθ = −1/2
• Sketch y = 2 sin x for 0≤x≤2π
• Find a side using the sine rule

Assessment

Check practice answers against the model answer; use the built-in practice questions as formative assessment.