Practice with Angles, Radians, and Unit Circle

 $\frac{8\pi}{3}$  is equivalent to what degree measure?

•  $480\degree$  

•  $240\degree$  

•  $800\degree$  

•  $24\degree$  

Tags

CCSS.HSF.TF.A.1

Which of the following angles are co-terminal to  $-\frac{\pi}{2}$  ?

•  $\frac{3\pi}{2}$  ,  $\frac{-5\pi}{2}$  

•  $\frac{\pi}{2}$  ,  $\frac{-3\pi}{2}$  

•  $\frac{5\pi}{2}$  ,  $\frac{-\pi}{2}$  

•  $\frac{5\pi}{2}$  ,  $-\frac{7\pi}{2}$  

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

tan(300^o)

• -√3 /3
• ½
• 2√3 /3
• -√3

Tags

CCSS.HSF.TF.A.2

Find sin(-240°)

• (√3)/2)

• (-1/2)

• (√2/2)

• (1/2)

Tags

CCSS.HSF.TF.A.4

cos (π/4)

• √3/2
• √2/2
• 1/2
• 1

Tags

CCSS.HSF.TF.A.2

What is the exact value of cos 135°

• √2/2
• -√2/2
• √3/2
• -√3/2

Tags

CCSS.HSF.TF.A.2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2

Tags

CCSS.HSF.TF.A.2