Solve Word Problems Involving the Cosine Law (Example 1)

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Cosine law: c^2=a^2+b^2−2ab∙cos⁡C

Use when you have the configuration: S S S or S A S

Q. Find the area of the gusset shown below.

Source: Technical Mathematics with Calculus, 3e. Calter & Calter.
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Once you know all three sides, you can use Heron's formula to find the area. That part was missed in the video!

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