unit circle

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

sinθ is positive in

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

tanθ is positive in

• the 1st and 2nd quadrants

• the 1st and 3rd quadrants

• the 1st and 4th quadrants

• the 2nd and 3rd quadrants

 $\frac{7\pi}{4}$  

Convert to degrees

• 300

• 135

• 315

• 45

 $\sec\ \ \frac{3\pi}{2}$  

• 0

• undefined

• 1

• -1

sin 270^o

• 0

• 1

• -1

• und

csc 330⁰

• 2

• -2

• √2

• -√2

 $\sin\ 120\degree$  

•  $\sqrt{3}$  

•  $\frac{1}{2}$  

•  $-\frac{\sqrt{3}}{2}$  

•  $\frac{\sqrt{2}}{2}$  

 $\cos\frac{4\pi}{3}$  

•  $\frac{\sqrt{2}}{2}$  

•  $\frac{1}{2}$  

•  $\frac{\sqrt{3}}{3}$  

•  $-\frac{1}{2}$