46 A level Mathematics Edexcel 2018 Paper 1 Q5

This video continues our series on the edXL 2018 A-level Mathematics Paper 1, focusing on question five. We tackle a challenging differentiation problem involving trigonometric functions, aiming to prove dy/dθ = a / (1 + sin 2θ). The lesson meticulously applies the quotient rule, breaking down each step from assigning variables to simplifying complex expressions. Discover how to navigate algebraic simplification and utilize key trigonometric identities, including sin²θ + cos²θ = 1 and the double angle formula for sine, to reach the final solution and find the constant 'a'. This video highlights how careful algebraic manipulation is often the most critical part of such problems. Visit AxiomTutoring.com for more resources and subscribe to @AxiomTutoringCourses for expert math tutorials.