7cos^2(x)+sin^2(x)-4=0

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Solution for 7cos^2(x)+sin^2(x)-4=0 equation:


Simplifying
7cos2(x) + sin2(x) + -4 = 0

Multiply cos2 * x
7cos2x + sin2(x) + -4 = 0

Multiply in2s * x
7cos2x + in2sx + -4 = 0

Reorder the terms:
-4 + 7cos2x + in2sx = 0

Solving
-4 + 7cos2x + in2sx = 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 + 7cos2x + 4 + in2sx = 0 + 4

Reorder the terms:
-4 + 4 + 7cos2x + in2sx = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 7cos2x + in2sx = 0 + 4
7cos2x + in2sx = 0 + 4

Combine like terms: 0 + 4 = 4
7cos2x + in2sx = 4

Add '-1in2sx' to each side of the equation.
7cos2x + in2sx + -1in2sx = 4 + -1in2sx

Combine like terms: in2sx + -1in2sx = 0
7cos2x + 0 = 4 + -1in2sx
7cos2x = 4 + -1in2sx

Divide each side by '7os2x'.
c = 0.5714285714o-1s-2x-1 + -0.1428571429in2o-1s-1

Simplifying
c = 0.5714285714o-1s-2x-1 + -0.1428571429in2o-1s-1

Reorder the terms:
c = -0.1428571429in2o-1s-1 + 0.5714285714o-1s-2x-1

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