Solve a cosine equation in degrees
Solve \(\cos\theta=-sqrt(2)/2\) for \(0^\circ\le \theta\le 360^\circ\). Enter the two solutions in increasing order.
Worked practice: trigonometric equation
Use the reference angle and quadrant information to list the solution angles.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.