2cos^215-1=0

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Solution for 2cos^215-1=0 equation: 


Simplifying
2cos215 + -1 = 0

Reorder the terms:
-1 + 2cos215 = 0

Solving
-1 + 2cos215 = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 1 + 2cos215 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2cos215 = 0 + 1
2cos215 = 0 + 1

Combine like terms: 0 + 1 = 1
2cos215 = 1

Divide each side by '2os215'.
c = 0.5o-1s-215

Simplifying
c = 0.5o-1s-215

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