2cos^2x-sinx-1=0

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Solution for 2cos^2x-sinx-1=0 equation:


Simplifying
2cos2x + -1sinx + -1 = 0

Reorder the terms:
-1 + 2cos2x + -1insx = 0

Solving
-1 + 2cos2x + -1insx = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 2cos2x + 1 + -1insx = 0 + 1

Reorder the terms:
-1 + 1 + 2cos2x + -1insx = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2cos2x + -1insx = 0 + 1
2cos2x + -1insx = 0 + 1

Combine like terms: 0 + 1 = 1
2cos2x + -1insx = 1

Add 'insx' to each side of the equation.
2cos2x + -1insx + insx = 1 + insx

Combine like terms: -1insx + insx = 0
2cos2x + 0 = 1 + insx
2cos2x = 1 + insx

Divide each side by '2os2x'.
c = 0.5o-1s-2x-1 + 0.5ino-1s-1

Simplifying
c = 0.5o-1s-2x-1 + 0.5ino-1s-1

Reorder the terms:
c = 0.5ino-1s-1 + 0.5o-1s-2x-1

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