f(x)=6cos(2x)

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


Simplifying
f(x) = 6cos(2x)

Multiply f * x
fx = 6cos(2x)

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

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

Multiply 6 * 2
fx = 12cos * x

Multiply cos * x
fx = 12cosx

Solving
fx = 12cosx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 12cos

Simplifying
f = 12cos

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