The approximation for cosπ20sinπ20\displaystyle \frac{\cos \frac{\pi}{20}}{\sin \frac{\pi}{20}}sin20πcos20π is 6.288.
Calculate the percentage error in your approximation, giving your answer to 2 decimal places
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.