The Cosine Rule
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Medium
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A triangle with side lengths (x+2), sqrt(73), and (2x-3). The angle between the sides (x+2) and (2x-3) is 60 degrees.

A triangle is shown with the following side lengths and angle:

  • The left side has length (x+2)(x + 2)(x+2).
  • The right side has length 73\sqrt{73}73​.
  • The base has length (2x−3)(2x - 3)(2x−3).
  • The interior angle between the left side and the base is 60∘60^\circ60∘.

Work out the value of xxx.

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The Cosine Rule Questions

Practise Eduqas GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the Eduqas GCSE Maths (C300QS) specification and written in Component 1 and Component 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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The Cosine Rule Questions

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