Express 1(1+4x)(1−x)\frac{1}{(1+4x)(1-x)}(1+4x)(1−x)1 in partial fractions.
Hence find the solution of the differential equation
(1+4x)(1−x)dydx=tany (1+4x)(1-x)\frac{dy}{dx} = \tan y (1+4x)(1−x)dxdy=tanyfor the interval −14<x<1-\frac{1}{4} < x < 1−41<x<1, given that y=π2y = \frac{\pi}{2}y=2π when x=0x = 0x=0.
Give your answer in the form sinny=f(x)\sin^n y = f(x)sinny=f(x) where nnn is an integer to be found.
Practise AQA A Level Maths 1.11 H: Integration with exam-style questions for A Level Maths. 436 questions covering 1.11.1 Fundamental Theorem of Calculus, 1.11.2 Integrating standard functions, 1.11.3 Definite integrals and areas, 1.11.4 Integration as the limit of a sum (A-level only), 1.11.5 Integration by substitution and by parts (A-level only), 1.11.6 Integration using partial fractions (A-level only), 1.11.7 Differential equations with separable variables (A-level only), and 1.11.8 Interpreting solutions of differential equations (A-level only), matched to the AQA A Level Maths (7357) 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.
