4cos^2(x)-5=8

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Solution for 4cos^2(x)-5=8 equation:


Simplifying
4cos2(x) + -5 = 8

Multiply cos2 * x
4cos2x + -5 = 8

Reorder the terms:
-5 + 4cos2x = 8

Solving
-5 + 4cos2x = 8

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 + 4cos2x = 8 + 5

Combine like terms: -5 + 5 = 0
0 + 4cos2x = 8 + 5
4cos2x = 8 + 5

Combine like terms: 8 + 5 = 13
4cos2x = 13

Divide each side by '4os2x'.
c = 3.25o-1s-2x-1

Simplifying
c = 3.25o-1s-2x-1

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