8=9cos(2x)

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Solution for 8=9cos(2x) equation:


Simplifying
8 = 9cos(2x)

Remove parenthesis around (2x)
8 = 9cos * 2x

Reorder the terms for easier multiplication:
8 = 9 * 2cos * x

Multiply 9 * 2
8 = 18cos * x

Multiply cos * x
8 = 18cosx

Solving
8 = 18cosx

Solving for variable 'c'.

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

Add '-18cosx' to each side of the equation.
8 + -18cosx = 18cosx + -18cosx

Combine like terms: 18cosx + -18cosx = 0
8 + -18cosx = 0

Add '-8' to each side of the equation.
8 + -8 + -18cosx = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -18cosx = 0 + -8
-18cosx = 0 + -8

Combine like terms: 0 + -8 = -8
-18cosx = -8

Divide each side by '-18osx'.
c = 0.4444444444o-1s-1x-1

Simplifying
c = 0.4444444444o-1s-1x-1

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