1
Q
2cos theta
A
z + 1/z
2
Q
2isin theta
A
z-1/z
3
Q
2cosn theta
A
z ^n + 1/z^n
4
Q
2isinn theta
A
z^n-1/z^n
5
Q
eulers relation
A
e^itheta = cos theta + isin theta
6
Q
exponential form
A
re ^i theta
r = modulus
theta = argument
7
Q
argument in positive quadrant
A
theta
8
Q
argument in positive x negative y quadrant
A
-theta
9
Q
argument in negative x positive y quadrant
A
pi - theta
10
Q
argument in negative x negative y quadrant
A
-(pi-theta)
11
Q
sum to infinity of wz^r
A
w/(1-z)
12
Q
sum to (n-1) of wz^r
A
w(z^n-1) / z-1
edexcel a level mathematics S&M
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