Answer:
a=10 and b= -12
Step-by-step explanation:
In my opinion I would use the mean. But the options that are given I would choose answer A. But I'm not 100% sure.
I can help but what is the (2)???
Answer:

Step-by-step explanation:
is an angle in the third quadrant
To find the reference angle subtract π from it
reference angle =
- π = 
Answer:
brainily has the answer
Step-by-step explanation: