4sin^2x-cosx-1=0

Solution for 4sin^2x-cosx-1=0 equation:

Simplifying
4sin2x + -1cosx + -1 = 0

Reorder the terms:
-1 + -1cosx + 4in2sx = 0

Solving
-1 + -1cosx + 4in2sx = 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 + -1cosx + 1 + 4in2sx = 0 + 1

Reorder the terms:
-1 + 1 + -1cosx + 4in2sx = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1cosx + 4in2sx = 0 + 1
-1cosx + 4in2sx = 0 + 1

Combine like terms: 0 + 1 = 1
-1cosx + 4in2sx = 1

Add '-4in2sx' to each side of the equation.
-1cosx + 4in2sx + -4in2sx = 1 + -4in2sx

Combine like terms: 4in2sx + -4in2sx = 0
-1cosx + 0 = 1 + -4in2sx
-1cosx = 1 + -4in2sx

Divide each side by '-1osx'.
c = -1o-1s-1x-1 + 4in2o-1

Simplifying
c = -1o-1s-1x-1 + 4in2o-1

Reorder the terms:
c = 4in2o-1 + -1o-1s-1x-1