Here is a sketch of the curve y=cosx∘y = \cos x^\circy=cosx∘ for 0≤x≤3600 \leq x \leq 3600≤x≤360

Use the graph to find estimates of the solutions, in the interval 0≤x≤3600 \leq x \leq 3600≤x≤360, of the equation:
cos(x)=−0.2\cos(x) = -0.2cos(x)=−0.2
10cos(x)=110 \cos(x) = 110cos(x)=1
Practise Edexcel GCSE Maths Trigonometric and Exponential Graphs with exam-style questions for Foundation and Higher tier. 33 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 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.