QCE Stuff > QCE Mathematical Methods
QCE Maths Methods Questions Thread
orla007:
--- Quote from: Bri MT on July 09, 2020, 05:49:59 pm ---Hi!
Welcome to the forums!
It's hard to describe much of how you approach this without giving it away (which I will happily do if you're still confused but I think it's more rewarding and you learn more from help than answers). That being said:
- try starting by writing out the sine rule
- then look at c/sinC and either b/sinB or a/sinA (i.e. work with only 2 fractions at a time)
- Rearrange it so that you get [something]/c = [something]/sinC
- Do again but for whichever of b/sinB and a/sinA you didn't use
- Then combine the two equations you get together for the result you need.
Once you have part a part b should be pretty straightforward.
Hope this helps and please let me know if this clarifies things enough :)
--- End quote ---
Ahhhh thank you!!!
Bri MT:
--- Quote from: orla007 on July 09, 2020, 05:59:17 pm ---
Ahhhh thank you!!!
--- End quote ---
No worries! I was actually teaching the sine rule on Monday so it was very fresh in my memory :)
1729:
--- Quote from: Bri MT on July 09, 2020, 05:49:59 pm ---Hi!
Welcome to the forums!
It's hard to describe much of how you approach this without giving it away (which I will happily do if you're still confused but I think it's more rewarding and you learn more from help than answers). That being said:
- try starting by writing out the sine rule
- then look at c/sinC and either b/sinB or a/sinA (i.e. work with only 2 fractions at a time)
- Rearrange it so that you get [something]/c = [something]/sinC
- Do again but for whichever of b/sinB and a/sinA you didn't use
- Then combine the two equations you get together for the result you need.
Once you have part a part b should be pretty straightforward.
Hope this helps and please let me know if this clarifies things enough :)
--- End quote ---
a+b/c can be separated into a/c +b/c
sinA/a=sinC/c
So sinA/sinC= a/c
sinB/b=sinC/c
So sinB/sinC=b/c
So sinB/sinC+ sinA/sinC=( sinA + sinB)/sinC
From then you should be able to get the second one.
matthew hay:
Hi there,
Do you or anyone know if there is an annotated syllabus? or even annotated Units 4 syllabus?? Please reply no if not (it saves me the extravagant search!
Thanks and kind regards, Matt
Bri MT:
Hey,
I'm pretty sure there aren't any annotated QCE methods syllabuses. There are other methods resources listed here but an annotated syllabus isn't one of them.
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