The Cosine Rule
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Medium
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A triangular garden plot is designed with the following dimensions:

  • The left side has length (x+1)(x + 1)(x+1) metres.
  • The right side has length 19 \sqrt{19}\,19​ metres.
  • The base has length (2x+1)(2x + 1)(2x+1) metres.
  • 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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