Unit Circle

sin 30 degrees =

• 1/2
• √3/2
• 0
• 1

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

• 1
• 0
• -1
• 1/2

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

• 1
• 0
• -1
• 1/2

sin(0°)

• 0
• 1/2
• √3/2
• 1

cos(60°)

• 0
• 1/2
• √3/2
• 1

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

• 1
• 0
• -1
• 1/2

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

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)

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

What is the exact value of sin 210°

• -1/2
• -√3/2
• 1/2
• √3/2