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# What Grade (9-1) Is This Question? watch

1. So I was brainstorming all last night and managed to create this question, I've checked it and it is fully functional and works. I was just looking for advice on what you guys would grade this question at because my intentions were it would be a grade 9 however i'm not sure. Any feedback is greatly appreciated
2. (Original post by Y11_Maths)
I haven’t tried it but it looks like grade 9 at first glance.

If x is anything then the equation for AB seems pointless since x isn’t referenced anywhere else?
3. (Original post by Notnek)
I haven’t tried it but it looks like grade 9 at first glance.

If x is anything then the equation for AB seems pointless since x isn’t referenced anywhere else?
I used x to make the question seem more complex and harder instead of giving x a value where people can sub it in after working it out. It just adds to the difficulty imo
4. This would definitely be 9, I'm predicted 9 and looking at this almost made me crap my pants. Let's hope this doesn't come up (or something similar)
5. (Original post by mundosinfin)
This would definitely be 9, I'm predicted 9 and looking at this almost made me crap my pants. Let's hope this doesn't come up (or something similar)
Actually I'm trying to solve this and I don't understand what you mean by 'bac=120 Respectively', namely the respectively part.
6. (Original post by mundosinfin)
Actually I'm trying to solve this and I don't understand what you mean by 'bac=120 Respectively', namely the respectively part.
It just means that angle bac=120 degrees. The respectively is just to intimidate students-it looks like its working
7. (Original post by Y11_Maths)
It just means that angle bac=120 degrees. The respectively is just to intimidate students-it looks like its working
But it doesn't make sense

Update: I'm trying to solve this now but as you get to the cosine rule bit the algebra is hellish, it would help if cos120 wasn't a weird number...
8. By all means attempt to solve it
10. (Original post by mekail2001)
Haha thank you very much
11. (Original post by mundosinfin)
But it doesn't make sense

Update: I'm trying to solve this now but as you get to the cosine rule bit the algebra is hellish, it would help if cos120 wasn't a weird number...
The algebra is very long winded
12. it looks like a difficult question, and i am trying to solve it, but how is angle a an obtuse angle when the diagram shows it is acute?
13. First glance I'd say it's definitely grade 8/9.

The diagram is a bit weird, it's acute but it says 120?
14. (Original post by ray44)
it looks like a difficult question, and i am trying to solve it, but how is angle a an obtuse angle when the diagram shows it is acute?
Surely you've learnt by now that diagrams are never accurate haha
15. (Original post by Y11_Maths)
Surely you've learnt by now that diagrams are never accurate haha
That's true but in trig questions it's very important to know if it's acute or not. Sin(x)=Sin(180-x) for instance could mean that your calculated angle or side in some problems changes (ambiguous case).
16. (Original post by Y11_Maths)
Surely you've learnt by now that diagrams are never accurate haha
fair enough haha, ill stop making excuses for myself and get it done
17. (Original post by thekidwhogames)
That's true but in trig questions it's very important to know if it's acute or not. Sin(x)=Sin(180-x) for instance could mean that your calculated angle or side in some problems changes (ambiguous case).
Thank you for your input, always happy to take notes on what I can change
18. (Original post by Y11_Maths)
Surely you've learnt by now that diagrams are never accurate haha
take this from someone who acc got a grade 9 in maths and is doing maths and f maths at A level, you saying BAC is not 120 degrees is literally wrong... like no diagram is ever that inaccurate when visibly it is not possible.
19. (Original post by Y11_Maths)
So I was brainstorming all last night and managed to create this question, I've checked it and it is fully functional and works. I was just looking for advice on what you guys would grade this question at because my intentions were it would be a grade 9 however i'm not sure. Any feedback is greatly appreciated
I'm sure you're very capable in maths for being able to do this, but I think this is more of an AS-Level question.

At least GCSE content with A Level application - similar to Mechanics 1.

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Updated: February 20, 2018
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