cos(2x)=-sin(x)

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Solution for cos(2x)=-sin(x) equation: 


Simplifying
cos(2x) = -1sin(x)

Remove parenthesis around (2x)
cos * 2x = -1sin(x)

Reorder the terms for easier multiplication:
2cos * x = -1sin(x)

Multiply cos * x
2cosx = -1sin(x)

Multiply ins * x
2cosx = -1insx

Solving
2cosx = -1insx

Solving for variable 'c'.

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

Divide each side by '2osx'.
c = -0.5ino-1

Simplifying
c = -0.5ino-1

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