z=cos(5x)cos(3y)

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Solution for z=cos(5x)cos(3y) equation: 


Simplifying
z = cos(5x) * cos(3y)

Remove parenthesis around (5x)
z = cos * 5x * cos(3y)

Remove parenthesis around (3y)
z = cos * 5x * cos * 3y

Reorder the terms for easier multiplication:
z = 5 * 3cos * x * cos * y

Multiply 5 * 3
z = 15cos * x * cos * y

Multiply cos * x
z = 15cosx * cos * y

Multiply cosx * cos
z = 15c2o2s2x * y

Multiply c2o2s2x * y
z = 15c2o2s2xy

Solving
z = 15c2o2s2xy

Solving for variable 'z'.

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

Simplifying
z = 15c2o2s2xy

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