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The Sine & Cosine Rule

C. b. a. A. c. B. The Sine & Cosine Rule. The sine rule:. The cosine rule. and. Area of triangle ABC. Remember: The letters in a formula can be interchanged. . . . . . . . . . . . . Which Formula to Use. 3 Sides. 2 Sides and Included angle.

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The Sine & Cosine Rule

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  1. C b a A c B The Sine & Cosine Rule The sine rule: The cosine rule and Area of triangle ABC Remember: The letters in a formula can be interchanged.

  2.            Which Formula to Use 3 Sides 2 Sides and Included angle 2 Sides and Opposite Angle When using bearings – remember they are measured from North in a Clockwise direction.

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