cos(30x)=4

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Solution for cos(30x)=4 equation: 


Simplifying
cos(30x) = 4

Remove parenthesis around (30x)
cos * 30x = 4

Reorder the terms for easier multiplication:
30cos * x = 4

Multiply cos * x
30cosx = 4

Solving
30cosx = 4

Solving for variable 'c'.

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

Divide each side by '30osx'.
c = 0.1333333333o-1s-1x-1

Simplifying
c = 0.1333333333o-1s-1x-1

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