.9cos(2x)=.7

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Solution for .9cos(2x)=.7 equation: 


Simplifying
0.9cos(2x) = 0.7

Remove parenthesis around (2x)
0.9cos * 2x = 0.7

Reorder the terms for easier multiplication:
0.9 * 2cos * x = 0.7

Multiply 0.9 * 2
1.8cos * x = 0.7

Multiply cos * x
1.8cosx = 0.7

Solving
1.8cosx = 0.7

Solving for variable 'c'.

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

Divide each side by '1.8osx'.
c = 0.3888888889o-1s-1x-1

Simplifying
c = 0.3888888889o-1s-1x-1

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