Cos^2(3x)=1

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Solution for Cos^2(3x)=1 equation: 


Simplifying
Cos2(3x) = 1

Remove parenthesis around (3x)
os2C * 3x = 1

Reorder the terms for easier multiplication:
3os2C * x = 1

Multiply os2C * x
3os2xC = 1

Solving
3os2xC = 1

Solving for variable 'o'.

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

Divide each side by '3s2xC'.
o = 0.3333333333s-2x-1C-1

Simplifying
o = 0.3333333333s-2x-1C-1

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