Answer:
23π/12 radians
Explanation:
To convert degrees to radians, we multiply by π/180 (because π radians = 180 degrees).
345 * π/180 = 345π/180 = 23π/12 radians
When they ask us to express it "exactly," that means to not simplify the π to 3.14 or something. When we leave the π in our answer, it is the most accurate possible.