Geometric Reasoning and Trigonometry · Measurement and Geometry

Trigonometric Ratios

Defining sine, cosine, and tangent as ratios of sides in right angled triangles.

Key Questions

  1. 1Why do the ratios of the sides of a right angled triangle remain constant for a given angle regardless of the triangle size?
  2. 2How do we decide which trigonometric ratio is the most efficient for a specific problem?
  3. 3What is the relationship between the angle of elevation and the angle of depression?

ACARA Content Descriptions

AC9M9M03
Year: Year 9
Subject: Mathematics
Unit: Geometric Reasoning and Trigonometry
Period: Measurement and Geometry

Suggested Methodologies

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