The Unit Circle

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

cos 4π/3

• -√3/2
• √3/2
• 1/2
• -1/2

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

What is the radius of the unit circle?

• 0
• 1
• 1/2
• √2/2

What is a complete circle in radians?

• π
• 2π
• 1/2 π
• 1

What is half a circle in radians?

• π/4
• π
• 2π
• π/2

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)
• (−√2∕2, −√2∕2)
• (−√3∕2, −√2∕2)
• (√2∕2, −√2∕2)

4π/3 is equal to how many degrees?

• 60°
• 240°
• 300°
• 120°

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)
• (−√2∕2, −√2∕2)
• (−√3∕2, −√2∕2)
• (√2∕2, −√2∕2)