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.
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.