r=cos(x*y)

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Solution for r=cos(x*y) equation: 


Simplifying
r = cos(x * y)

Multiply x * y
r = cos(xy)

Multiply cos * xy
r = cosxy

Solving
r = cosxy

Solving for variable 'r'.

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

Simplifying
r = cosxy

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