Complex Numbers in Polar Form
Polar or Trigonometric Form of Complex Number: The Polar form of a complex number is given by r(cos θ + isin θ) where r is the radius and θ is the angle.
How to Convert Complex Numbers from Standard Rectangular to Polar (Trig)Form
Given the complex number z=a+bi
1. Identify a and b
2. Find the radius by applying the formula r = √(a2+b2)
3. Find the angle θ using the formula θ=tan-1 (b/a)  [add π whenever a < 0 (a is negative)]
How to convert complex numbers from standard to  rectangular form radius  angle arctan b/a cos sin