Sin(x+90)=-cosx

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Solution for Sin(x+90)=-cosx equation: 


Simplifying
Sin(x + 90) = -1cosx

Reorder the terms:
inS(90 + x) = -1cosx
(90 * inS + x * inS) = -1cosx
(90inS + inxS) = -1cosx

Solving
90inS + inxS = -1cosx

Solving for variable 'i'.

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

Reorder the terms:
cosx + 90inS + inxS = -1cosx + cosx

Combine like terms: -1cosx + cosx = 0
cosx + 90inS + inxS = 0

The solution to this equation could not be determined.

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