Unit Circle

Convert 150⁰ to radians

• 5π/6
• 3π/4
• 7π/6
• 2π/3

What is 7π/4 radians in degrees?

• 300
• 135
• 315
• 45

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

• -288⁰
• -260⁰
• -275⁰

tan 7π/4

• -1
• 1
• √2/2
• undefined

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

tan (-π)

• undefined
• 0
• 1
• -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 quadrant is -2π/3 in?

• I

• II

• III

• IV

tanθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0