Express 34cos(2x+tan−1(35))\displaystyle \sqrt{34}\cos\left(2x+\tan^{-1}\left(\frac{3}{5}\right)\right)34cos(2x+tan−1(53)) in the form pcos2x+qsin2xp\cos 2x+q\sin 2xpcos2x+qsin2x
Give full details of a sequence of three transformations needed to transform the curve y=5cos2x−3sin2xy = 5 \cos 2x - 3 \sin 2xy=5cos2x−3sin2x onto the curve y=cosxy = \cos xy=cosx
348 exam-style questions on Edexcel A Level Maths Trigonometry and Modelling, covering 7.1 Addition Formulae, 7.2 Double Angle Formulae, 7.3 Solving Trigonometric Equations, 7.4 Simplifying a cos x +- b sin x, 7.5 Proving Trigonometric Identities, and 7.6 Modelling with Trigonometric Functions. Each one has a worked solution and a mark scheme showing where the marks go.