x Turn on thread page Beta
 You are Here: Home >< Maths

# Edexcel FP2 Official 2016 Exam Thread - 8th June 2016 watch

1. (Original post by Zacken)
So what's the problem? The argument of a complex number raised to a power is the power multiplied by the argument.
Oh is that it then ? I think because it was in the form arg(...) i was getting confused, thanks for clearing it up.
2. (Original post by coolguy123456)
Oh is that it then ? I think because it was in the form arg(...) i was getting confused, thanks for clearing it up.
Yes, that's it. arg(...) just means "what is the argument of ...".
3. (Original post by Zacken)
Yes, that's it. arg(...) just means "what is the argument of ...".
Yeah i forgot that the argument is just the angle and in the whole z^n = r(cos ... etc thing where you multiply angle (realise it is the argument) with the power. Thanks
4. (Original post by coolguy123456)
yeah i get that but you went from arg((0.5W)^1/3) to arg (0.5W/3) ??
no I went from arg((0.5w)^(1/3)) to 1/3*arg(0.5w)
5. (Original post by jazztheman)
How did u go from second line to third line
rearrange w to make z the subject, then subsitute this into the arg(z)
I dont know what the problem with this question is to be honest, you should all know logs by now
6. (Original post by coolguy123456)
Yeah i forgot that the argument is just the angle and in the whole z^n = r(cos ... etc thing where you multiply angle (realise it's not the argument) with the power. Thanks
No worries.
7. (Original post by kennz)
rearrange w to make z the subject, then subsitute this into the arg(z)
I dont know what the problem with this question is to be honest, you should all know logs by now
Yeh makes sense sorry haha we all have those dumb moments thanks again good luck for the exam
8. (Original post by kennz)
arguments work like logs
(Original post by kennz)
arguments work like logs
(Original post by kennz)
arguments work like logs
Wow so they do 😯 😯 feel slightly silly for not realising that earlier, it's a really good way of thinking about it.

Anyways... good luck for Wednesday everyone. I'll be on here straight afterwards haha x
9. For anybody interested, I'll be doing model solutions the day after.
10. (Original post by Zacken)
For anybody interested, I'll be doing model solutions the day after.
Cool
11. (Original post by Zacken)
For anybody interested, I'll be doing model solutions the day after.
u beta get everything rite. dnt get stuk on complex numbaz
12. How would one simplify
13. (Original post by Zacken)
For anybody interested, I'll be doing model solutions the day after.
Will it be paper included or same style like you did with other modules (ie C2)
14. (Original post by edothero)
Will it be paper included or same style like you did with other modules (ie C2)
Same like I did with C2. Wish I could include the paper but copyright. :/
15. (Original post by Zacken)
Same like I did with C2. Wish I could include the paper but copyright. :/
No worries, I hope I can remember my answers
16. (Original post by edothero)
How would one simplify
Half angle formulae
17. (Original post by Student403)
Half angle formulae
Or double angle formulae where the double angle is theta
18. (Original post by Student403)
Or double angle formulae where the double angle is theta
ya took a while sinx = 1/2sin(x/2)cos(x/2) and cosx= 1-2sin(x/2)
19. Quite a good question actually, if anyone wants to try.

given that
Show that

20. (Original post by edothero)
Quite a good question actually, if anyone wants to try.

given that
Show that

Yeah it was cool

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: February 24, 2017
Today on TSR

### Complete university guide 2019 rankings

Find out the top ten here

### Can I go to freshers even if I'm not at uni?

Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups

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