EDEXCEL IAL WMA11 01 P1 new OCT 2019 Q9 Addition to Graphs of Trig Functions

Extension to Question 9 from the Oct 2019 IAL P1 paper.
Here is the link to the actual question:


Here is a link to the playlist for the rest of the paper:


Here is a link for other AS and A level papers you may be interested in:

Functions