f(x)=x^3cos(8x)

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Solution for f(x)=x^3cos(8x) equation:


Simplifying
f(x) = x3cos(8x)

Multiply f * x
fx = x3cos(8x)

Remove parenthesis around (8x)
fx = cosx3 * 8x

Reorder the terms for easier multiplication:
fx = 8cosx3 * x

Multiply cosx3 * x
fx = 8cosx4

Solving
fx = 8cosx4

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 8cosx3

Simplifying
f = 8cosx3

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