Edexcel M4 Exam Discussion Thread [June 5th] Watch
I got pi/2. Also anyone know what time we could expect model answers?
I think he was... there is literally no way the A* boundary will be 70, more in the region of 66-67. what are you smoking mate? you ought to come down from your cocky high. STOP BRAGGING. The difficulty was comparable to june 2013 m4 (UK) so 66 for the A*.
yes it was pi/3. x in terms of t should have been 1/6 sin 2t - 1/12 sin 4t, therefore dx/dt = 1/3 cos 2t - 1/3 cos 4t. dx/dt = 0 at instantenous rest therefore cos 2t = cos 4t. 2t = 2kπ +- 4t. at first instantaneous rest k = 1 therefore t = π - 2t 3t = π t = π/3