f(x)=2x-cos(3x)

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Solution for f(x)=2x-cos(3x) equation:


Simplifying
f(x) = 2x + -1cos(3x)

Multiply f * x
fx = 2x + -1cos(3x)

Remove parenthesis around (3x)
fx = 2x + -1cos * 3x

Reorder the terms for easier multiplication:
fx = 2x + -1 * 3cos * x

Multiply -1 * 3
fx = 2x + -3cos * x

Multiply cos * x
fx = 2x + -3cosx

Reorder the terms:
fx = -3cosx + 2x

Solving
fx = -3cosx + 2x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -3cos + 2

Simplifying
f = -3cos + 2

Reorder the terms:
f = 2 + -3cos

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