IGCSE Maths / Introducing trigonometry

Two-step right-angled triangle problems revision notes

Edexcel International GCSE Maths (4MA1), chapter 16: Introducing trigonometry, specification point 4.8c-f. Part of the full course.

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Two-step right-angled triangle problems use a side shared by two triangles. Find that side in the triangle with enough information, then use its full value to solve the other triangle.

More lessons in Introducing trigonometry

• The sine ratio
• The cosine ratio
• The tangent ratio
• Labelling sides and choosing the trig ratio
• Finding a missing side with trigonometry
• Missing side when the unknown is in the denominator
• Finding a missing angle with inverse trig
• Combining Pythagoras and trigonometry
• Right-angled trigonometry with bearings
• Angles of elevation and depression