Munaligirlshighsch/Trigonometry/Chapter 2/THE SINE RILE

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The Sine Rule

Let us now look at the Sine Rule

Icon objectives.jpg
At the end of the lesson we should be able to
  • state the sine rule
  • apply Sine Rule to calculate the lengths of sides of an angle
  • apply Sine Rule to calculate the sizes of angles
  • apply Sine Rule to solve word problems

The sine rule is an important rule relating the sides and angles of any triangle (it doesn't have to be right-angled!):

If a, b and c are the lengths of the sides opposite the angles A, B and C in a triangle, then: A triangle