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Chapter Summary

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11.2 Chapter summary (EMA7G)

Presentation: 2GPV

  • We can define three trigonometric ratios for right-angled triangles: sine (\(\sin\)), cosine (\(\cos\)) and tangent (\(\tan\)).

  • Trigonometry is used to help us solve problems in two dimensions that involve right-angled triangles, such as finding the height of a building.

  • The angle of elevation is the angle formed by the line of sight and the horizontal plane for an object above the horizontal plane.

  • The angle of depression is the angle formed by the line of sight and the horizontal plane for an object below the horizontal plane.