Review Unit Circle

What is 7π/4 radians in degrees?

• 300

• 135

• 315

• 45

What is 120 degrees in radians?
 

• 2π/3

• π/3

• 5π/3

• 4π/3

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

• 1

• 0

• -1

• 1/2

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

• 1/2

• 0

• -1

• 1

What are the coordinates of  210° on the unit circle?

• (−√3/2, −1/2)

• (√3/2, −1/2)

• (−√3/2, 1/2)

• (−1/2,−√3/2 )

What the coordinates of 270° on the unit circle?

• 0, 1

• 1, 0

• -1, 0

• 0, -1

Based on your unit circle sin(30^o)=

• sqt2/2

• 1/2

• 1

• sqt3/2

Based on your unit circle cos(30^o)=

• 1

• 1/2

• sqt3/2

• sqt2/2

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

• 0

• -1

• 1/2

• 1