y=6cos(2x)

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Solution for y=6cos(2x) equation: 


Simplifying
y = 6cos(2x)

Remove parenthesis around (2x)
y = 6cos * 2x

Reorder the terms for easier multiplication:
y = 6 * 2cos * x

Multiply 6 * 2
y = 12cos * x

Multiply cos * x
y = 12cosx

Solving
y = 12cosx

Solving for variable 'y'.

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

Simplifying
y = 12cosx

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