Recent content by paul18

cos(2y) + 3sin(y) = 2. Thanks very much that's what I needed a refresher on :)

Homework Statement Previous part of the question I have solved: Express cos(2x) in terms of sin(x): I got this answer: cos(2x)=1-2sin2(x) Hence or otherwise solve the equation cos(x) + 3sin(x/2) = 2 Homework Equations Double angle formulae: cos(2x)=cos(2x) - sin(2x)...