Find the equation of the tangent to the curve x=cos(2y+π)x = \cos(2y + \pi)x=cos(2y+π) at (0,π4)\displaystyle \left(0, \frac{\pi}{4}\right)(0,4π).
Give your answer in the form y=ax+by = ax + by=ax+b, where a a\,a and b b\,b are constants to be found.
Practise Edexcel A Level Old Maths Trigonometry with exam-style questions for A Level Old Maths. 13 questions, matched to the Edexcel A Level Old Maths (9371) specification and written in Unit exams C1, C2, C3 and C4 plus two applied units (e.g. S1 and M1) 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.