Level:
Project ID:
1003085708
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
The arithmetic mean of all values of \( \theta \) between \( 0^{\circ} \) and \( 360^{\circ} \) for which
\( \cos\!\left(\theta - 20^{\circ}\right) = 0 \) is:
\( 200^{\circ} \)
\( 55^{\circ} \)
\( 145^{\circ} \)
\( 155^{\circ} \)