Find the modulus and argument of z=1-cos(a)-i*sin(a)
The Attempt at a Solution
This is as far as I can get, I have asked my math teacher but he is not very familiar with thise.
my textbook gives mod(z) as 2sin(2a) and arg(z) as (a-pi)2
BTW this question is from the IB math textbook, there exists a solutions manual but I do not have it... the question is 11.2, 19 a)
Thanks in advance!