Edexcel ALevel Maths Walkthrough Videos
A selection of videos from the DoingMaths YouTube channel featuring walkthroughs of exam questions from past Edexcel Alevel mathematics papers. We are constantly expanding this section. For any requests, send us a message via the contact form.
Edexcel ALevel Maths, Pure Paper 1, June 2018

Pure Paper 1, 2018,Q11. Given that theta is small and is measured in radians, use the small angle approximations to find an approximate value of (1  cos 4theta)/(2theta sin 3theta).


Pure Paper 1, 2018, Q22. A curve C has equation y = x^2  2x  24rootx, x>0.
ai. Find dy/dx ii. Find d2y/dx2 b. Verify that C has a stationary point when x = 4. c. Determine the nature of this stationary point, giving a reason for your answer. 

Pure Paper 1, 2018, Q33. Figure 1 shows a sector AOB of a circle with centre O and radisu r cm. The angle AOB is theta radians. The area of the sector AOB is 11cm^2.
Given that the perimeter of the sector is 4 times the length of the arc AB, find the exact value of r. 

Pure Paper 1, 2018, Q4 