The Unit Circle

Based on your unit circle cos(90^o)=

• 1
• 0
• -1
• 1/2

cos(60°)

• 0
• 1/2
• √3/2
• 1

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

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 are the coordinates of 60° on the unit circle?

• (0, 1)
• (1/2, √3/2)
• (√3/2, 1/2)
• (√2/2, 1/2)

• √3
• -√3
• √3/3
• -√3/3

• 1
• -1
• 0
• undefined