2(cosx)2-9cosx-5=0

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Solution for 2(cosx)2-9cosx-5=0 equation:


Simplifying
2(cosx) * 2 + -9cosx + -5 = 0

Reorder the terms for easier multiplication:
2 * 2cosx + -9cosx + -5 = 0

Multiply 2 * 2
4cosx + -9cosx + -5 = 0

Reorder the terms:
-5 + 4cosx + -9cosx = 0

Combine like terms: 4cosx + -9cosx = -5cosx
-5 + -5cosx = 0

Solving
-5 + -5cosx = 0

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 + -5cosx = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -5cosx = 0 + 5
-5cosx = 0 + 5

Combine like terms: 0 + 5 = 5
-5cosx = 5

Divide each side by '-5osx'.
c = -1o-1s-1x-1

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

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