f(1)=2*cos(1)-1

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Solution for f(1)=2*cos(1)-1 equation: 


Simplifying
f(1) = 2cos(1) + -1

Reorder the terms for easier multiplication:
1f = 2cos(1) + -1

Reorder the terms for easier multiplication:
1f = 2 * 1cos + -1

Multiply 2 * 1
1f = 2cos + -1

Reorder the terms:
1f = -1 + 2cos

Solving
1f = -1 + 2cos

Solving for variable 'f'.

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

Divide each side by '1'.
f = -1 + 2cos

Simplifying
f = -1 + 2cos

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