Unit Circle Practice

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

sin (π/2)

• √3/2
• √2/2
• 1/2
• 1

cos (π/4)

• √3/2
• √2/2
• 1/2
• 1

cos(π)

• √3/2
• -√2/2
• -1
• 1

cos(5π/3)

• -√2/2
• -1/2
• 1/2
• √3/2

cos(30^o)

• - ½
• √3/2
• 2√3 /3
• ½

sin(11π/6)

• -1/2
• 1/2
• √3/2
• -√3/2

Convert 150⁰ to radians

• 5π/6
• 3π/4
• 7π/6
• 2π/3

What is 7π/4 radians in degrees?

• 300
• 135
• 315
• 45

Based on your unit circle cos(0^o)=

• 1
• 0
• -1
• 1/2