Circular Functions Formative Week 4

What is 20 degrees as an equivalent angle in radians?

• $\frac{π}{20}$

• $\frac{π}{18}$
  

• $\frac{π}{9}$
  

• $20π$

Which of these angles is in the third quadrant? (tick all that are correct)

• 210 degrees

• 170 degrees

• $\frac{3π}{4}$ radians

• $\frac{7π}{6}$ radians

• $\frac{5π}{3}$ radians

sin(π) is equal to:

• –1

• 0

• 1

• undefined

What is the radius of the unit circle?

• 0
• 1
• 1/2
• √2/2

Tags

CCSS.HSF.TF.A.2

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

Tags

CCSS.HSF.TF.A.2

cos 5π/3

• -1/2

• 1/2

• √3/2

• -√3/2

Tags

CCSS.HSF.TF.A.2

tan 7π/4

• -1
• 1
• √2/2
• undefined

Tags

CCSS.HSF.TF.A.2

cos 4π/3

• -√3/2
• √3/2
• 1/2
• -1/2

Tags

CCSS.HSF.TF.A.2

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

Tags

CCSS.HSF.TF.A.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)

Tags

CCSS.HSF.TF.A.2