Trig 2.2

Trig 2.2

Trig Functions: A Unit Circle Approach

Multiple Choice

Quick Check 1!

Let  $P=\left(-3,-5\right)$  be a point on the unit circle that corresponds to  $t$ . Find the exact value of  $\cot t$  .

•  $\frac{5}{3}$  

•  $\frac{3}{5}$  
  

•  $-\frac{3}{5\ }$  

•  $-\frac{1}{3}$  

Multiple Choice

Quick Check 2!

Find the exact value of  $\cos\frac{9\pi}{2}$ .
(Hint: You may need to subtract  $2\pi$  more than once!)

• 1

• undefined 

• 0

• -1

Multiple Choice

Quick Check 3!

Find the exact value of  $\tan\frac{\pi}{4}-\sin\frac{3\pi}{2}$  .

(Hint: Use your table!)

• 0

• 2

• -1

• 1

Multiple Choice

Quick Check 4!
Use a calculator to evaluate  $\tan\frac{7\pi}{9}$ . Round your answer to 2 decimal places.  

• -0.84

• 0.04

Multiple Choice

Quick Check 5!

Let  $P=\left(1,2\right)$  be a point on the terminal side of  $\theta$ . Use  $r$  to find the exact value of  $\sin\theta$ .  

• 1

• 2

•  $\frac{2\sqrt{5}}{5}$  

•  $\frac{\sqrt{5}}{5}$