cos((x+120))=0.8

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Solution for cos((x+120))=0.8 equation: 


Simplifying
cos(x + 120) = 0.8

Reorder the terms:
cos(120 + x) = 0.8
(120 * cos + x * cos) = 0.8
(120cos + cosx) = 0.8

Solving
120cos + cosx = 0.8

Solving for variable 'c'.

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

Reorder the terms:
-0.8 + 120cos + cosx = 0.8 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
-0.8 + 120cos + cosx = 0.0

The solution to this equation could not be determined.

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