Circular Functions (mid-topic)

What is the radius of the unit circle?

• 0

• 1

• 2

• 3

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

 $\tan\left(\frac{π}{2}\right)\ is\ equal\ to:$ 

• 1

• 0

• undefined

• –1

 $\sin\left(30\right)$  =

•  $\frac{1}{√2\ }$  

•  $\frac{1}{√3}$  

•  $\frac{1}{2}$  

•  $\frac{√3}{2}$  

 $\tan\left(\frac{π}{4}\right)=$ 

• 1

•  $√3$  

•  $\frac{1}{√3}$  

•  $\frac{√3}{2}$  

 $\cos\left(\frac{3π}{4}\right)=$ 

•  $\frac{1}{√2}$  

•  $-\frac{1}{√2}$  

•  $\frac{√3}{2}$  

•  $-\frac{√3}{2}$  

•  $\frac{1}{2}$  

 $\tan\left(\frac{5π}{3}\right)$  is equal to

•  $\frac{1}{√3}$  

•  $-\frac{1}{√3}$  

•  $√3$  

•  $-√3$  

•  $-\frac{√3}{2}$  

The period of the graph shown is _____