f(x)=-tan(4x)

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Solution for f(x)=-tan(4x) equation: 


Simplifying
f(x) = -1tan(4x)

Multiply f * x
fx = -1tan(4x)

Remove parenthesis around (4x)
fx = -1ant * 4x

Reorder the terms for easier multiplication:
fx = -1 * 4ant * x

Multiply -1 * 4
fx = -4ant * x

Multiply ant * x
fx = -4antx

Solving
fx = -4antx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -4ant

Simplifying
f = -4ant

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