f(x)=4sin(2x)

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Solution for f(x)=4sin(2x) equation: 


Simplifying
f(x) = 4sin(2x)

Multiply f * x
fx = 4sin(2x)

Remove parenthesis around (2x)
fx = 4ins * 2x

Reorder the terms for easier multiplication:
fx = 4 * 2ins * x

Multiply 4 * 2
fx = 8ins * x

Multiply ins * x
fx = 8insx

Solving
fx = 8insx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 8ins

Simplifying
f = 8ins

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