I have the following question. It's basically my first day doing complex numbers, so I am absolutely lost here.
I have read that the modulus-arg form is
$$ z = r(\cos\theta + i \sin\theta)$$
Now, in this case, I tried expanding the equation given (I'm only on part i right now) and got:
$$z – i = 2\cos\theta – 2i\sin\theta $$
What do I do now?
Yes, I can factor the 2 out, but my issue is that I was told that the value of r and the signs of cos and sin must be positive for the mod-arg form. I'm not sure what to do.
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