Subtract \(y\) from both sides.
\[Sin(x+y)=\cos{x}-y\]
Divide both sides by \(Si\).
\[n(x+y)=\frac{\cos{x}-y}{Si}\]
Divide both sides by \(x+y\).
\[n=\frac{\frac{\cos{x}-y}{Si}}{x+y}\]
Simplify \(\frac{\frac{\cos{x}-y}{Si}}{x+y}\) to \(\frac{\cos{x}-y}{Si(x+y)}\).
\[n=\frac{\cos{x}-y}{Si(x+y)}\]
n=(cos(x)-y)/(Si*(x+y))
