Year 9

Surds and trigonometry

Lessons (12)

  • In this lesson, we will explore the concept of rationality and irrationality in numbers, and learn how to classify rational and irrational numbers.
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    1 Worksheet
    1 Quiz
    1 Video
  • In this lesson, we will learn what a surd is and we will explore how to accurately estimate the value of a surd.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will recap how to use Pythagorean theorem to find the length of missing sides in triangles leaving the answers is surd form.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will look at basic surd rules in particular multiplication and division.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will learn about the the ratio of side lengths in right angle triangles.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will look at the special cases of 30 and 60 degrees right angled-triangles.
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    2 Quizzes
    1 Video
  • In this lesson, we will develop an understanding of trigonometric ratios focusing on sine.
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    2 Quizzes
    1 Video
  • In this lesson, we will explore trigonometric ratios focusing on sine and cosine.
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    2 Quizzes
    1 Video
  • In this lesson, we will learn how to find missing sides and angles in triangles using sine and cosine for 30 and 60 degrees.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will learn how to find missing sides using sine and cosine for any angle in a triangle.
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    1 Worksheet
    2 Quizzes
    1 Video
  • In this lesson, we will use inverse sine and cosine to find missing angles in triangles.
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    2 Quizzes
    1 Video
  • In this lesson, we will look at the graphs made by the sine and cosine functions and compare them to highlight similarities and differences.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video