The Cosine Rule: How to Calculate Sides and Angles in Triangles

The video tutorial introduces trigonometry, focusing on the cosine rule. It explains how to use the cosine rule to calculate side lengths and angles in non-right-angled triangles. The tutorial covers the formulas for the cosine rule, demonstrates its application in solving problems, and highlights its use in navigation scenarios. Key points include labeling triangles correctly and knowing when to apply the cosine rule.

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