Unit circle

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)

Tags

CCSS.HSF.TF.A.2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2

Tags

CCSS.HSF.TF.A.2

sinθ is positive in

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

Tags

CCSS.HSF.TF.A.2

cosθ is positive in

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

Tags

CCSS.HSF.TF.A.3

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8

sinθ 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 cos 90°?

• ½
• undefined
• 1
• 0

Tags

CCSS.HSG.SRT.C.7

What is sin 45°?

• 1
• ^√3/₂
• ½
• ^√2/₂

Tags

CCSS.HSF.TF.A.2

What is cos 30°?

• ^√3/₂
• ½
• ^√2/₂
• 1

Tags

CCSS.HSF.TF.A.3

CCSS.HSG.SRT.C.6

cos(π)=

• 0
• 1
• -1
• 1/2

Tags

CCSS.HSF.TF.A.2

How many degrees is ^π/₆ radians?

• 90°
• 60°
• 45°
• 30°

Tags

CCSS.HSF.TF.A.1