In Quadrant 2 the sin function is positive which makes the answer negative since we're looking for Cot.
Let's explain the process of Sin.When we put everything together we get +Sin70Positive for the second quad. Sin for the function and 70 for the reference angle.
180
T
70
270
C
360
We subtract the angle by 180 because it's in the 2nd quadrant. This gives us the reference angle.
Let's take out my favorite tool the notebook. Now we find Cot.
180
T
70
270
C
360
Let's explain the process of Cot.When we put everything together we get -Cot70Negative for the second quad. Cot for the function and 70 for the reference angle. Answers are +Sin70 and -Cot70.
180
T
70
270
C
360
We subtract the angle by 180 because it's in the 2nd quadrant. This gives us the reference angle.