http://www.mei.org.uk/files/papers/2011_June_c3.pdfPlease can someone see if my method of going about the question 9ii) is right or wrong? Thanks for all help in advance!
So basically I differentiated it to get dy/dx = 0.5 cos (0.5 x) , then i subbed in the value of 0 for x and got the dy/dx to be 0.5.
So then I wrote 0.5 cos(0.5x) > 0.5
then tried to solve the inequality and ended up with 0 and 4pi. Then I wrote that the x value of 0 leads to the gradient of 1/2. 4pi also leads to 0.5 as gradient , but a value of 4 pi is outside the given domain in the question ....do u think they would give me the marks?
If you scroll the document down further , you can find the mark scheme model answer; obviously they have done it in a diff way? am i right in doing this method?