Question

Which equation can be used to solve for x in the triangle below?

Answer 1

Using the cosine rule, the equation to use to solve for x is: x = √(4.0² + 4.7² − 2(4.0)(4.7) × cos(41)) ≈ 3.1 cm.

How to Use the Cosines Rule to Solve a Triangle?

The cosine rule is given as, c = √(a² + b² − 2ab × cos(C))

Given the following:

• c = x = ?
• a = 4.0 cm
• b = 4.7 cm
• C = 41°

Plug in the values:

x = √(4.0² + 4.7² − 2(4.0)(4.7) × cos(41))

x ≈ 3.1 cm

Learn more about the cosine rule on:

brainly.com/question/23720007

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