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4:09
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Jonathan Robinson
Proof of the Cosine Rule | GCSE Maths | Mr Mathematics
Mathematics revision video that shows you how prove the cosine rule using trigonometry in right angled triangles. If you want further practise with this mathematics lesson or more mathematics resources in general then visit http://goo.gl/V7sJBw to download a printable worksheet with solutions. Perfect revision for GCSE Mathematics!! About Me My ...
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