Mastering the Unit Circle in Trigonometry

What is the radius of the unit circle?

• 0.5

• 1

• 2

• pi

How is the circumference of the unit circle calculated?

• C = 2 * pi * r

• C = 2 * r

• C = pi * r

• C = pi / r

What angle do you reach after traveling half the distance around the unit circle?

• pi radians

• 2pi radians

• pi/2 radians

• 3pi/2 radians

At what angle is the top of the circle located?

• 2pi radians

• pi/4 radians

• pi/2 radians

• pi radians

Which angle is located in the middle of quadrant 4?

• 3pi/4

• pi/4

• 5pi/4

• 7pi/4

What is the angle measure equivalent to 120 degrees?

• pi/6

• 3pi/2

• pi/3

• 2pi/3

Which quadrant does the angle 5pi/3 belong to?

• Quadrant 2

• Quadrant 1

• Quadrant 4

• Quadrant 3

How are the coordinates for angles on the unit circle determined?

• Adding pi

• Dividing by 2

• Multiplying by pi

• Using square roots of numerators

In which quadrant are both coordinates negative?

• Quadrant 3

• Quadrant 2

• Quadrant 1

• Quadrant 4

What method is used to label the rest of the points on the unit circle?

• Calculating derivatives

• Using trigonometric identities

• Integrating functions

• Reflection and changing signs