The Student Room Group

C3 Review Exercise 2 Question 8b

http://pmt.physicsandmathstutor.com/download/Maths/A-level/C3/Solutionbank-Heinemann/C3%20Review%20Exercise%202.pdf

For the graph drawn, there are six intersection points. But in the final answer, it shows that there are only 4 solutions.

I understand how to get those 4 solutions, but what about the x = 1.57 and x = -1.57 radians? Shouldn't this be included in the final answer?
Original post by HumzaAhmed
http://pmt.physicsandmathstutor.com/download/Maths/A-level/C3/Solutionbank-Heinemann/C3%20Review%20Exercise%202.pdf

For the graph drawn, there are six intersection points. But in the final answer, it shows that there are only 4 solutions.

I understand how to get those 4 solutions, but what about the x = 1.57 and x = -1.57 radians? Shouldn't this be included in the final answer?


can you tell us which page the question is on ?
Reply 2
Original post by the bear
can you tell us which page the question is on ?


Page 14
Original post by HumzaAhmed
Page 14


they have not put all 6 answers together at the end, but they do want all 6.
Reply 4
Original post by the bear
they have not put all 6 answers together at the end, but they do want all 6.


In the Edexcel textbook for C3, they also only give those 4 solutions. The textbook only shows answers. So that is most likely why solution bank got it wrong too.

Quick Reply

Latest