A triangular plot of land has side lengths 15 m, 18 m, and 22 m. The angle between the 15 m and 18 m sides is labeled y∘y^\circy∘.
Work out the value of yyy.
Give your answer to 1 decimal place.
36 exam-style questions on Eduqas GCSE Maths The Cosine Rule. Each one has a worked solution and a mark scheme showing where the marks go.