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  1. Key Stage 3
  2. Subjects
  3. Maths
  4. Surds and trigonometry

Lesson overview: Introduction to Surds

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In this lesson, you will learn what a surd is and how to estimate the value of a surd.

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12 lessons in Surds and trigonometry:

  1. Rational and irrational numbers
  2. Introduction to Surds
  3. Surds and triangles
  4. Manipulating surds
  5. Varying the ratio of side lengths in right angle triangles
  6. The case of 30 and 60 degrees
  7. The sine ratio
  8. The sine and cosine ratios
  9. The sine and cosine ratios for 30 and 60 degrees
  10. Finding missing sides using sine and cosine for any angle
  11. Using inverse sine and cosine to find missing angles
  12. Sine and cosine graphs

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