7cos^2x-3cosx-4=0

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Solution for 7cos^2x-3cosx-4=0 equation:


Simplifying
7cos2x + -3cosx + -4 = 0

Reorder the terms:
-4 + -3cosx + 7cos2x = 0

Solving
-4 + -3cosx + 7cos2x = 0

Solving for variable 'c'.

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

Add '4' to each side of the equation.
-4 + -3cosx + 4 + 7cos2x = 0 + 4

Reorder the terms:
-4 + 4 + -3cosx + 7cos2x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -3cosx + 7cos2x = 0 + 4
-3cosx + 7cos2x = 0 + 4

Combine like terms: 0 + 4 = 4
-3cosx + 7cos2x = 4

Reorder the terms:
-4 + -3cosx + 7cos2x = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -3cosx + 7cos2x = 0

The solution to this equation could not be determined.

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