Level:
Project ID:
1003086001
Accepted:
1
Clonable:
0
Easy:
0
The arithmetic mean of all \( x\in\left[0^{\circ};360^{\circ}\right] \) satisfying the equation \( \sin 2x = \sin x \) is:
\( 180^{\circ} \)
\( 240^{\circ} \)
\( 360^{\circ} \)
\( 270^{\circ} \)