Understanding Angles in the Unit Circle - High School Math
Card 0 of 2
Question
In the unit circle, what is the angle in radians that corresponds to the point (0, -1)?
In the unit circle, what is the angle in radians that corresponds to the point (0, -1)?
Answer
On the unit circle, (0,-1) is the point that falls between the third and fourth quadrant. This corresponds to 
.
On the unit circle, (0,-1) is the point that falls between the third and fourth quadrant. This corresponds to
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Question
What is the reference angle for 
?
What is the reference angle for
Answer
To find the reference angle, subtract 
(1 trip around the unit circle) from the given angle until you reach an angle which is less than 
.
To find the reference angle, subtract
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