x=cos(3t)

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Solution for x=cos(3t) equation: 


Simplifying
x = cos(3t)

Remove parenthesis around (3t)
x = cos * 3t

Reorder the terms for easier multiplication:
x = 3cos * t

Multiply cos * t
x = 3cost

Solving
x = 3cost

Solving for variable 'x'.

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

Simplifying
x = 3cost

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