# FCP2 Complex numbers

Thread starter 5 months ago
#1
For questions like the following, how do you know whether to work it out using the binomial expansion method or using results like z+1/z = 2 cos theta? Thanks.
Last edited by Htx_x346; 5 months ago
0
5 months ago
#2
(Original post by Htx_x346)
For questions like the following, how do you know whether to work it out using the binomial expansion method or using results like z+1/z = 2 cos theta? Thanks.
For ones in that form {sin(ntheta)=...} you use the regular binomial expansion method and when you have a trig function with a power you use the z+(1/z)
1
Thread starter 5 months ago
#3
(Original post by Quarsient)
For ones in that form {sin(ntheta)=...} you use the regular binomial expansion method and when you have a trig function with a power you use the z+(1/z)
thanks so much!!
0
5 months ago
#4
(Original post by Htx_x346)
thanks so much!!
np
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

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

### Poll

Join the discussion

#### How did your AQA A-level Physics Paper 1 exam go?

Great! Feeling positive (109)
28.91%
It went fairly well (182)
48.28%
It didn't go too well (58)
15.38%
TERRIBLE! (28)
7.43%