sinx=-cos(90+x)

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Solution for sinx=-cos(90+x) equation: 


Simplifying
sinx = -1cos(90 + x)
insx = (90 * -1cos + x * -1cos)
insx = (-90cos + -1cosx)

Solving
insx = -90cos + -1cosx

Solving for variable 'i'.

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

Divide each side by 'nsx'.
i = -90cn-1ox-1 + -1cn-1o

Simplifying
i = -90cn-1ox-1 + -1cn-1o

Reorder the terms:
i = -1cn-1o + -90cn-1ox-1

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