Complex Numbers
* means conjugate j = i = sqrt(1) = imaginary unit Find roots example: z^{2} = 4j Convert to exponential form first: z^{2} = 4e^{jÏ€/2} z^{2} = r^{2} = sqrt(0^{2} + 4^{2}) = 4 z = r = 2 k = (0, 1 ...n where n = expon' of z) = 0, 1 arg(z^{2}) = 2 arg(z) = Ï€/2 + 2kÏ€ arg(z) = Ï€/4 + kÏ€ Substitute values of k (0, 1) for z = ze^{jarg(z)} = 2e^{jÏ€/4}, 2e^{j3Ï€/4} 
Discrete Probability & Sets & Whatever
1. Binomial Distribution n = trials, x = successes, p = probability of success 2. Hypergeometric Distribution N = deck size, n = draws, X = copies of card, k = successes 
Matrix Manipulations

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Discrete Math Cheat Sheet by Dois
Equations commonly used in Discrete Math
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