y=15cos(4x)

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Solution for y=15cos(4x) equation: 


Simplifying
y = 15cos(4x)

Remove parenthesis around (4x)
y = 15cos * 4x

Reorder the terms for easier multiplication:
y = 15 * 4cos * x

Multiply 15 * 4
y = 60cos * x

Multiply cos * x
y = 60cosx

Solving
y = 60cosx

Solving for variable 'y'.

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

Simplifying
y = 60cosx

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