Hence find an approximation of 6cos(θ)+cos2(4θ)6 \cos(\theta) + \cos^2(4\theta)6cos(θ)+cos2(4θ) when θ=3∘\theta = 3^\circθ=3∘. Give your answer to 3 significant figures.
278 exam-style questions on Edexcel A Level Maths Radians, covering 5.1 Radian Measure, 5.2 Arc Length, 5.3 Areas of Sectors and Segments, 5.4 Solving Trigonometric Equations, and 5.5 Small Angle Approximations. Each one has a worked solution and a mark scheme showing where the marks go.