Edexcel Maths Trigonometry Revision Notes
Master Edexcel Maths Trigonometry using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Trigonometry is a branch of mathematics that studies the relationships between the angles and sides of triangles, particularly right-angled triangles. It is essential for solving problems involving angles, distances, and heights in various fields such as physics, engineering, and architecture.
Key Concepts
- 1Understanding the basic trigonometric ratios: sine, cosine, and tangent.
- 2Using the unit circle to define trigonometric functions for all angles.
- 3Applying the Pythagorean theorem in trigonometric contexts.
- 4Solving problems involving right-angled triangles using SOH-CAH-TOA.
- 5Understanding the graphs of trigonometric functions and their properties.
Simple Explanation
Trigonometry helps us understand the relationships between the angles and sides of triangles. The main functions are sine, cosine, and tangent, which can be remembered using the acronym SOH-CAH-TOA. These functions allow us to find unknown lengths or angles in right-angled triangles. Additionally, trigonometric functions can be graphed to show how they behave over different angles.
Memory Trick
“SOH-CAH-TOA: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.”
Flashcards
What is the sine of an angle?
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Exam Questions
Describe and explain the relationship between sine, cosine, and tangent in a right-angled triangle. [6 marks]
6 marksView mark scheme hint▾
Define each function, explain their ratios, and provide examples.
Explain how the unit circle is used to define trigonometric functions. [4 marks]
4 marksView mark scheme hint▾
Discuss the coordinates on the unit circle and their relation to sine and cosine.
What is meant by the term 'periodicity' in trigonometric functions? [2 marks]
2 marksView mark scheme hint▾
Define periodicity and give examples of periodic functions.
Practice Quiz
What is the value of sin(90°)?
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