Complex Numbers 5 - De-Moivre’s Theroem #complexnumbers #demoivrestheorem #jonahemmanuel

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This video teaches about De-Moivre's theorem and how to use De-Moivre's theorem to solve problems involving complex numbers such as the expansion of complex numbers

Multiplication of Complex Numbers in Polar form:

link to First class on Complex Numbers:

link to Second class on Complex Numbers here:

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For the second example (1+ i)^20

n = 20 and should be used as 20 while solving and not 10.

I changed it from 20 to 10 and hence the problem there, but the procedure for solving is same.

Best of luck 🙂

jonahemmanuelofficial

Sir, I have a question on the Argand's diagram. When you were solving the 3rd question, the one that is 'evaluate [1-√(3)]' you used the diagram to get your θ (theta), but you didn't use it for the previous example. So I'd like to know when to use the diagram cause I am quite confused. I'll humbly wait for your reply.

Raquel_jhonson

for the first exercise I got -886.81+ 521i and the second exercise I got 16i

arunabmansaray

Please when do we use the tita ref an when do we use the real tita which we get with the argand’s diagram

Derrobe

pls is it everytime we look for theta we use argand diagram or not

jamesonunkwo

Answer on 2n there is -1024 in degrees, you calculated r value in radians thats y it gives 32i

anthonylengwejr

Please do you have classes for statisticians

agboukamaka

You deserve a trophy of being the best teacher in Africa

ROMEMOSES

Sir my answer to the first ecercise is -512√3 + 512i

jamiuzubairuadinoyi-lzih

But sir in the question it's power 20, so where is the 10 coming from

MwansaJoy-wbjq

SIR, but n is equal to 20, and not 10 🤔.

UcheOnuigbo

You are my mentor forever I love the way you lecture

FodayESesay

But sir, why didn't u use the argand angle stuff during the first example? Im quite confused as to when to use it

AmaraMySon-obyy

Ansa for the second last last is -1024 but sir please am bad off in trigonometry l begged for Her help am from Ug

AssisRabanoRe-xynp

The first example seems
How did you get 32

almustaphamuhammad

Sir i got -10√3 + 10i for the first question
Please help
Much love from nepal 🇳🇵

simpp

Good day sir
Buh n value was 20 during the calculation you inserted raised to 10.
Is there a reason for that?

mudashirufauwziyyat

Sir please with my answer, without the argand diagram i got my answer to be 16 +16 root 3
So can i get valid answer without the argand diagram?

HappyDaffodils-fjnu

BEFORE YOU SHOULD FOR THE ARGUMENT CHECK THE QUADRANT, IT LIES IN

ElvisBoateng-qu

Sir for the 1st exercise my answer is [ -512√3 + 512i ]

GénitooPiaax

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