Cosine Rule Example - Search Videos

Cosine Rule for Unknown Side - Formula - Explanation - Worked Examples

We use the cosine rule to find an unknown side length in a triangle when we know the other two sides and the angle between them. We learn how to use the formula : c^2 = a^2 + b^2 - 2.a.b.cosC by working through 2 examples. Time Stamps: 00:00 : Introduction 00:15 : Formula & When to Use It 02:20 : Worked Example 1 03:57 : Worked Example 1

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