cos^2y=4cosy-1

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Solution for cos^2y=4cosy-1 equation:


Simplifying
cos2y = 4cosy + -1

Reorder the terms:
cos2y = -1 + 4cosy

Solving
cos2y = -1 + 4cosy

Solving for variable 'c'.

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

Add '-4cosy' to each side of the equation.
-4cosy + cos2y = -1 + 4cosy + -4cosy

Combine like terms: 4cosy + -4cosy = 0
-4cosy + cos2y = -1 + 0
-4cosy + cos2y = -1

Reorder the terms:
1 + -4cosy + cos2y = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -4cosy + cos2y = 0

The solution to this equation could not be determined.

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