Circular Functions

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

cos 5π/3

• -1/2

• 1/2

• √3/2

• -√3/2

tan 7π/4

• -1
• 1
• √2/2
• undefined

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 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 radian measure corresponds to the point 

• π/4
• 3π/2
• 5π/4
• 7π/3

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2