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Trigonometry: Cosine Rule

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Trigonometry: Cosine Rule

This GCSE tutorial on the cosine rule teaches how to use the rule to find missing angles and missing sides. The cosine rule is used in non-right-angled triangles and in situations where we have a side-angle-side set-up. We look at several worked examples including a question using bearings. #cosinelaw #gcse #maths Sine rule video: https://youtu ...

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