f(x)=(0.5*cos(2x))

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Solution for f(x)=(0.5*cos(2x)) equation: 


Simplifying
f(x) = (0.5cos(2x))

Multiply f * x
fx = (0.5cos(2x))

Remove parenthesis around (2x)
fx = (0.5cos * 2x)

Reorder the terms for easier multiplication:
fx = (0.5 * 2cos * x)

Multiply 0.5 * 2
fx = (1cos * x)

Multiply cos * x
fx = (1cosx)

Solving
fx = (1cosx)

Solving for variable 'f'.

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

Divide each side by 'x'.
f = cos

Simplifying
f = cos

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