Unit Circle

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

cos 4π/3

• -√3/2
• √3/2
• 1/2
• -1/2

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)

• 1
• -1
• 0
• √2/2

• -1
• 0
• undefined
• √3

Convert the following to degrees:
-8π/5 radians

• -288⁰
• -260⁰
• -275⁰

tan 7π/4

• -1
• 1
• √2/2
• undefined

sec 3π/2

• 0
• undefined
• 1
• -1

tan (-π)

• undefined
• 0
• 1
• -1