Answer:
∠ S = 15°
Step-by-step explanation:
the secant- secant angle S is half the difference of the measures of the intercepted arcs, then
∠ S = [tex]\frac{1}{2}[/tex] (AC - EN) = [tex]\frac{1}{2}[/tex] (60 - 30)° = [tex]\frac{1}{2}[/tex] × 30° = 15°
