r=2cos(3x)

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Solution for r=2cos(3x) equation: 


Simplifying
r = 2cos(3x)

Remove parenthesis around (3x)
r = 2cos * 3x

Reorder the terms for easier multiplication:
r = 2 * 3cos * x

Multiply 2 * 3
r = 6cos * x

Multiply cos * x
r = 6cosx

Solving
r = 6cosx

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Simplifying
r = 6cosx

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