y=cos(7*x)

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Solution for y=cos(7*x) equation: 


Simplifying
y = cos(7x)

Remove parenthesis around (7x)
y = cos * 7x

Reorder the terms for easier multiplication:
y = 7cos * x

Multiply cos * x
y = 7cosx

Solving
y = 7cosx

Solving for variable 'y'.

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

Simplifying
y = 7cosx

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