Section 7.3 Unit Circle Video Quiz

What is the radius of the unit circle?

• 3 units

• 0.5 units

• 1 unit

• 2 units

Which of the following angles is coterminal with 120 degrees?

• 480 degrees

• 360 degrees

• 240 degrees

• 600 degrees

What is the reference angle for 120 degrees?

• 90 degrees

• 30 degrees

• 45 degrees

• 60 degrees

In which quadrant is sine positive and cosine negative?

• Quadrant I

• Quadrant IV

• Quadrant III

• Quadrant II

What is the sine of 60 degrees?

• √2/2

• √3/2

• 1/2

• 1

What is the cosine of 45 degrees?

• 1/2

• √3/2

• √2/2

• 1

What is the reference angle for 240 degrees?

• 30 degrees

• 60 degrees

• 90 degrees

• 45 degrees

What are the coordinates of the point on a circle with radius 20 and angle 120 degrees?

• (-10, 10√3)

• (10, 10√3)

• (10, -10√3)

• (-10, -10√3)

What is the sine of 7π/6?

• 1/2

• -1/2

• -√3/2

• √3/2

What is the cosine of 5π/3?

• -√3/2

• √3/2

• -1/2

• 1/2