9cos^2(x)-5=-1

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Solution for 9cos^2(x)-5=-1 equation:


Simplifying
9cos2(x) + -5 = -1

Multiply cos2 * x
9cos2x + -5 = -1

Reorder the terms:
-5 + 9cos2x = -1

Solving
-5 + 9cos2x = -1

Solving for variable 'c'.

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

Add '5' to each side of the equation.
-5 + 5 + 9cos2x = -1 + 5

Combine like terms: -5 + 5 = 0
0 + 9cos2x = -1 + 5
9cos2x = -1 + 5

Combine like terms: -1 + 5 = 4
9cos2x = 4

Divide each side by '9os2x'.
c = 0.4444444444o-1s-2x-1

Simplifying
c = 0.4444444444o-1s-2x-1

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