Complex Number Multiplication

Use the diagram below to research the effects of multiplying complex numbers.[br][br]Look for a geometrical meaning too!
Complex Number Multiplication
Hints:[br]Set one number to z1 = 1 and move z2 in a circle.[br]Then set z1 = 1 + i and repeat.[br]What happens if z1 and z2 are set to the same value?[br]How does this help with z2.

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