Cos(x)=.9

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Solution for Cos(x)=.9 equation: 


Simplifying
Cos(x) = 0.9

Multiply osC * x
osxC = 0.9

Solving
osxC = 0.9

Solving for variable 'o'.

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

Divide each side by 'sxC'.
o = 0.9s-1x-1C-1

Simplifying
o = 0.9s-1x-1C-1

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