The Cosine Rule
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The diagram shows triangle XYZXYZXYZ. The side XZ XZ\,XZ is 12.6 cm, the side YZ YZ\,YZ is 15.1 cm, and the angle ∠XZY=35∘\angle XZY = 35^\circ∠XZY=35∘. The side XY XY\,XY is labeled z z\,z cm.

Triangle XYZ with side XZ = 12.6 cm, side YZ = 15.1 cm, angle Z = 35 degrees, and side XY = z cm.

Calculate the length of zzz. Give your answer to 3 significant figures.

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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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