f(x)=-cos^2x+4cosx+5

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Solution for f(x)=-cos^2x+4cosx+5 equation: 


Simplifying
f(x) = -1cos2x + 4cosx + 5

Multiply f * x
fx = -1cos2x + 4cosx + 5

Reorder the terms:
fx = 5 + 4cosx + -1cos2x

Solving
fx = 5 + 4cosx + -1cos2x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 5x-1 + 4cos + -1cos2

Simplifying
f = 5x-1 + 4cos + -1cos2

Reorder the terms:
f = 4cos + -1cos2 + 5x-1

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