The Cosine Rule
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Hard
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A triangular sail for a model boat has dimensions as follows:

  • One side has length (x+2)(x + 2)(x+2) inches.
  • The other side has length (3x−2)(3x - 2)(3x−2) inches.
  • The edge opposite the 60∘ 60^\circ\,60∘ angle has length 76 \sqrt{76}\,76​ inches.

Work out the value of xxx.

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The Cosine Rule Questions

Practise OCR GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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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