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Standard Form of Complex Numbers
z = a+bi

Absolute Value of a Complex number
z=√(a²+b²)

Trigonometric Form of a Complex Number
z=r(cosΘ +isinΘ), where a = rcosΘ, b=rsinΘ, and r=√(a²+b²), and tanΘ=b/a.

Product of Two Complex Numbers in Trigonometric Form
z_{1}z_{2}=r_{1}r_{2}[cos(Θ_{1}+Θ_{2})+isin(Θ_{1}+Θ_{2})]

Quotient of Two Complex Numbers in Trigonometric Form
z_{1} / z_{2}=r_{1 }/ r_{2}[cos(Θ_{1}Θ_{2})+isin(Θ_{1}Θ_{2})], where z_{2}!=0

DeMoivre's Theorem
 if z = r(cosΘ+isinΘ)
 z^{n}=[r(cosΘ+isinΘ)]^{n }= r^{n} (cosnΘ+isinnΘ)

Finding Roots of Complex Numbers
(cos( +isin( )) where k =0, 1, 2, 3..., n1.

Motion Formula using Parametric Equations
 x=(V_{0}cosΘ)t
 y=h+(V_{0}sinΘ)t4.9t^{2}
 4.9 if in meters, 16 if in feet

Finding rectangular equations of parametric equations
Solve for t in the x or y equation, then plug that value for t in whichever equation, x or y, that you didn't use.

Relationships to convert from polar to rectangular

Relationships to convert from rectangular to polar
 r²=x²+y²
 tanΘ=

