Answer:
100
Step-by-step explanation:
200-300= -100 But the negative of a negative is a positive so the answer is: 100.
fun fact : by reading what i just right u just lost 5 sec of ut life
Answer:

Step by step
Remember, a reference angle is a positive acute angle that represents an angle θ of any measurement.
a)
, then its reference angle is 
b)
is in the second cuadrant, then its reference angle is 
c)
, then it is in the first cuadrant and the reference angle is
.
d)
and it is in the third cuadrant, then its reference angle is 