Review Unit Circle

• ½
• √2/2
• √3/2
• 1

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 radius of the unit circle?

• 0

• 1

• 1/2

• √2/2

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2

• 1
• -1
• 0
• √2/2

• √3/3
• √3
• 1
• undefined

tan(300^o)

• -√3 /3

• ½

• 2√3 /3

• -√3

Choose the best match for the graph.

• 30^o

• 45^o

• 60^o

• 90^o

Based on the unit circle, what is the value of sin?

• y

• x

• x/y

• y/x

Based on the unit circle, what is the value of cos?

• y

• x

• x/y

• y/x