Argand Diagram

Question 1

How ti find complex number when in circle

Answer 1

Draw it the tangent, remember tangent makes 90°!
- the try find the mod
- then find the angle
Quickly solve

Question 2

MUST USE PROTRACTOR TO DRAW THE ANGLES!

Answer 2

Could get a wrong

Question 3

Also it’s 3 roots, no matter the positon, what must you know the shape on argand diagram will look like?

Answer 3

Must be a polygon of same lengths as the roots

And the radius but be able to fall on circle, don’t lack