f(x)=3cos(3x)-3

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Solution for f(x)=3cos(3x)-3 equation: 


Simplifying
f(x) = 3cos(3x) + -3

Multiply f * x
fx = 3cos(3x) + -3

Remove parenthesis around (3x)
fx = 3cos * 3x + -3

Reorder the terms for easier multiplication:
fx = 3 * 3cos * x + -3

Multiply 3 * 3
fx = 9cos * x + -3

Multiply cos * x
fx = 9cosx + -3

Reorder the terms:
fx = -3 + 9cosx

Solving
fx = -3 + 9cosx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -3x-1 + 9cos

Simplifying
f = -3x-1 + 9cos

Reorder the terms:
f = 9cos + -3x-1

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