f(x)=sin*3*x-cos*x

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


Simplifying
f(x) = sin * 3x + -1cos * x

Multiply f * x
fx = sin * 3x + -1cos * x

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

Multiply ins * x
fx = 3insx + -1cos * x

Multiply cos * x
fx = 3insx + -1cosx

Reorder the terms:
fx = -1cosx + 3insx

Solving
fx = -1cosx + 3insx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -1cos + 3ins

Simplifying
f = -1cos + 3ins

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