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Countdown to Exams - Day 76 - Sine and Cosine rules

Countdown to Exams - Day 76 - Sine and Cosine rules

In today's blog post, we take a look at the Sine and Cosine rules. These rules are used when we are asked to find missing lengths or angles in non-right-angled triangles. The Sine rule is best used when you have an angle and its opposite length and the Cosine rule when you have two sides and the included angle. It is then a case of substituting know values into the formulae and rearranging to generate your answer.

You will not be given these formulae in the exam so makes sure you commit them to memory.

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