Understanding trigonometric functions

 $300\degree$  

•  $\frac{5\pi}{12}$  

•  $\frac{5\pi}{9}$  

•  $\frac{5\pi}{8}$  

•  $\frac{5\pi}{3}$  

Convert 120° to pi radians

Mathematical Equivalence

OFF

The terminal side of θ in standard position contains the point (8,-15). What does tan θ equal?

• -17/8
• -15/17
• -15/8
• 8/17

value of tan 45⁰ =1

• TRUE

• FALSE

What is the ratio for sine?

• O/H
• H/A
• H/O
• O/A

 $7\ \frac{\pi}{4}$  

• 240°

• 270°

• 300°

• 315°

• 330°

• $\sin\ 150\degree=\frac{\sqrt{3}}{2}\ ;\ \cos\ 150\degree\ =\ \frac{1}{2}$

• $\sin\ 150\degree=-\frac{\sqrt{3}}{2}\ ;\ \cos\ 150\degree\ =\ -\frac{1}{2}$

• $\sin\ 150\degree=\frac{1}{2}\ ;\ \cos\ 150\degree\ =\ \frac{\sqrt{3}}{2}$

• $\sin\ 150\degree=\frac{1}{2}\ ;\ \cos\ 150\degree\ =-\frac{\sqrt{3}}{2}$

Find

 $\tan\ 45\degree$  

•  $\sqrt{2}$  

•  $\frac{2\sqrt{3}}{3}$  

•  $\frac{1}{2}$  

•  $1$