Enrich · Mathematics Advanced 11–12 – Year 11 · Trigonometry and measure of angles

Enrich Examine the proof of the sine rule a/sin⁡A = b/(sin⁡B) = c/sin⁡C, cosine rule c² = a² + b² - 2abcos⁡C and the area of a triangle formula A = 1/2absin⁡C for a given triangle ABC

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