Step 1 :The given equation is \(\sin \theta=-\frac{\sqrt{2}}{2}\).
Step 2 :We know that sine is negative in the third and fourth quadrants.
Step 3 :The reference angle for \(\frac{\sqrt{2}}{2}\) is \(45^\circ\).
Step 4 :So the solutions to the equation are \(180^\circ + 45^\circ\) and \(360^\circ - 45^\circ\).
Step 5 :angle1 = 225
Step 6 :angle2 = 315
Step 7 :Final Answer: The solutions to the equation are \(\boxed{225^\circ}\) and \(\boxed{315^\circ}\).