Answer:
The answer is B and C.
Step-by-step explanation:
Hope this helps! Let me know if it doesn’t make sense
Answer:

Step-by-step explanation:
If AB is tangent to the circle, then angle ABO is right angle and triangle AOB is special
triangle. In this triangle, the leg that is opposite to the angle of 30° is half of the hypotenuse. Thus,

By the Pythagorean theorem,

If you divide a negative by a negative, your result will be positive.
For example, -5/-1=5.