Unit Circle Trig Review

 $\sin\theta$  respresents...

• The x-coordinate on the unit circle 

• The y-coordinate on the unit circle

• The angle  $\theta$  on the unit circle

• The ratio of the y and x-coordinates

Tags

CCSS.HSF.TF.A.2

 $\sin\left(0\right)\ =\ ?$  

Tags

CCSS.HSF.TF.A.2

Where is $\sin\theta$  positive?

•  $30°$  

•  $\ \frac{4\pi}{7}$  

•  $\ \frac{7\pi}{2}$  

•  $\frac{13\pi}{7}$  

Tags

CCSS.HSF.TF.A.2

Check all the angles where $\cos\left(\theta\right)$ is positive: 

•  $0°$  

•  $\frac{19\pi}{12}$  

•  $-3\pi$  

•  $405°$  

•  $\frac{6\pi}{7}$  

Tags

CCSS.HSF.TF.A.2

Convert $\frac{3\pi}{4}$  radians to degrees.

Tags

CCSS.HSF.TF.A.1

 $\sin\left(\frac{\pi}{4}\right)\ =\ ?$  

•  $0$  

•  $1$  

•  $\frac{\sqrt{2}}{2}$  

•  $\frac{1}{2}$  

Tags

CCSS.HSF.TF.A.2

 $\cos\left(\pi\right)\ =\ ?$  

Tags

CCSS.HSF.TF.A.2

Find the exact value of $\cot\left(\frac{4\pi}{3}\right)$ . 

•  $1$  

•  $-1$  

•  $\frac{\sqrt{3}}{3}$  

•  $-\frac{\sqrt{3}}{3}$  

Tags

CCSS.HSF.TF.A.2

What is the exact value of sin (π/4)

• √2∕2

• 1/2

• √3/2

• 0

Tags

CCSS.HSF.TF.A.2

What is the exact value of cos (5π/6)

• -1/2

• 1/2

• √3/2

• -√3/2

Tags

CCSS.HSF.TF.C.9