Complex Numbers (Year 2) 13 • Geometric Problems - centre at origin • CP2 Ex1G • 🎯

Edexcel Core Pure Year 2

Thurs 8/10/20

[bethanwylde]

Hi Mr Bicen! When solving these problems, why do we have to use this method? In the first example, if we know that one of the roots is sqrt(3) + i, then why can't we just cube this to get z^3 and find nth roots like we did previously? Thanks.

[Jack-csyb]

18:00 the maths behind it is so complex, nice pun 😂

[rugbyresponse]

Hi Mr Bicen, if we find the matrix multiplication method easier, is it still okay to do it that way in the exam if we have the coordinate?

[abzhassan]

wait how did you get 120 for the matrix rotation?

[mattimakadsi]

Hi, Can you explain why for Q3 in the textbook (ex1G), they use omega = e^pi/3 rather than e^2pi/3. Surely the transformation/rotation should be by 2pi/3?

[chibi]

Hello I was just wondering how solving geometric problems is any different to your previous video in the playlist where you found other roots by adding 2pi/n to the power?

[redarrow]

Hi Mr Bicen,
Loved the video, it really helped me to understand this and this was something I struggled with the most from the chapter. I was wondering if you could solve the ant question (core pure 2 Ex 1G, Q6) as no one in my class can seem to figure it out.
Thanks!

[annagana]

Hello Mr Bicen,
Please, at the end bit in this video, where you did the matrix multiplication, how did you get theta to be 120 degrees?

[zain]

9:22 hi im a bit confused on how you got omega here. Does omega just represent the next root ?