#dont understand how to do d and e
55 messages · Page 1 of 1 (latest)
this is the solution to it
For d) to the same trick I showed you and calculate the modulus, solve for y then
In e) |z-(0+0i)| is a circle again but the argument is 0 to π/4 what does that mean?
@regal tartan
srry trying to figure out d but i think i got it
oh ok
it means that the max is pi/4?
wait no
Yes and the minimum angle?
oh and 0 is minimum
Thats it
We draw the circle from 0 to π/4
Because those complex numbers have an angle between 0 and π/4
oh ok
and then what about |z|?
it would be 4 right?
im also confused about where the 2√2 comes from
|z| = |z-(0+i0)| =< 4 is a circle with radius 4 and center (0,0)
2sqrt(2) is just the maximum imaginary part value not really relevant
ohh ok
Basicsally the complex number with angle π/4 is
adonhs
And as you see x = y = 2sqrt(2)
Solve for y
It's a linear equation
Or find 2 points that satisfy the equation and then draw a line through those points and done
oh right why didn't i think of that
idk
i got this and i know how to do one of the lines
but you know the line that goes through -2 and 3?
where does that come from
It's one line
only need to solve for y
get 2 points, draw a line and done
why overcomplicating stuff?
oh ok
sorry, im just really bad with maths
thank you for helping me
idk why the drew this 2nd line