You are Here: Home >< Maths

# IGCSE Add Maths May 2016 Paper 11 Doubt regarding degree and radians Watch

1. In the graphical question, where we had to find the area under the cos graph by integrating it, i used degree instead of radians. That question was for 8 marks and so i am really scared. But all my steps were correct. Will they cut all the marks ?
2. (Original post by DoubtClarify)
In the graphical question, where we had to find the area under the cos graph by integrating it, i used degree instead of radians. That question was for 8 marks and so i am really scared. But all my steps were correct. Will they cut all the marks ?
They will award some of the marks, there will be method marks for the integration steps you correctly performed. Try and find a similar question on a past paper and use the mark scheme for that paper to give you an idea of how many marks you might be awarded. I suspect you'll get 2 or 3 marks but without seeing the exact question and your answer it's hard to tell.

Posted from TSR Mobile
3. (Original post by gdunne42)
They will award some of the marks, there will be method marks for the integration steps you correctly performed. Try and find a similar question on a past paper and use the mark scheme for that paper to give you an idea of how many marks you might be awarded. I suspect you'll get 2 or 3 marks but without seeing the exact question and your answer it's hard to tell.

Posted from TSR Mobile

This is just to give u an idea of the question: We were given a cos graph, and we had to find its maximum point ( labelled B ) and the point where it intersects the x axis ( labelled A ). Finding A and B were two separate parts of the questions holding 2 marks each.
The third part was to find the area between the points A and B for 4 marks.
Since, I did parts 1 and 2 in degrees, the ans for the third part is wrong. Thought, all my steps are clearly mentioned.

How many marks do u think i will lose now and how do u determine where to use radians and where to use degrees?

4. (Original post by DoubtClarify)

This is just to give u an idea of the question: We were given a cos graph, and we had to find its maximum point ( labelled B ) and the point where it intersects the x axis ( labelled A ). Finding A and B were two separate parts of the questions holding 2 marks each.
The third part was to find the area between the points A and B for 4 marks.
Since, I did parts 1 and 2 in degrees, the ans for the third part is wrong. Thought, all my steps are clearly mentioned.

How many marks do u think i will lose now and how do u determine where to use radians and where to use degrees?

If you are told the graph is drawn between 0 and pi or -pi to pi or similar limits that mention fractions or multiples of pi you know the question requires radians.
WHENEVER the question involves differentiation or integration of trigonometric functions the question has to be done in radians.

I'm not familiar enough with their marking guideline to be certain but my guess is that you will be awarded 3-4 of the available marks.

Posted from TSR Mobile
5. (Original post by gdunne42)
If you are told the graph is drawn between 0 and pi or -pi to pi or similar limits that mention fractions or multiples of pi you know the question requires radians.
WHENEVER the question involves differentiation or integration of trigonometric functions the question has to be done in radians.

I'm not familiar enough with their marking guideline to be certain but my guess is that you will be awarded 3-4 of the available marks.

Posted from TSR Mobile
Thank u

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 2, 2016
Today on TSR

### Is this person a genius?

...with these A Level results?

### I think I'm transgender AMA

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.