Answer:
arc AB = 60°
Step-by-step explanation:
The diameter splits the circle into two semi circles.
in the semicircle above the diameter, you can do 180° - 120° = 60°
so arc AB = 60°
( I'm sorry; I'm not sure how to get the answer in terms of pi. )
+ i
Using the exact value
cos60° = and sin60° = , then
3(cos60° + isin60°)
= 3( + i) ← distribute by 3
= + i ← in the form a + bi
isabella