Trigonometry Ratios

The Cosine Law states that for a : Example 1. Find the missing side shown in the diagram below using the cosine law. Solution. Example 1 cont. So the missing length is 23.3 units long. Example 2. Find the angle A using the cosine law. Solution. First using algebra manipulate the formula to isolate Cos A. Example 2 cont. Support Questions ................
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