Trigonometry and Unit Circle Review

y = arcsin (x)
D: [-1, 1]
R: [- $\pi$ / 2 , $\pi$ / 2]
y = arccos (x)
D: [-1, 1]

R: [0 , $\pi$ ]

y = arctan (x)

D: (- $\infty$  , $\infty$ )

R: [- $\pi$ / 2, $\pi$ / 2]   

What questions do you have about the 4.7 notes video?

Let's discuss and make some more connections.

Let's practice filling in the unit circle by memory.

Lets do 10 minutes of practice by using this online activity:

https://www.mathwarehouse.com/unit-circle/unit-circle-game.php

- Cotangent is the reciprocal of Tangent

cot $\theta$ = 1 / tan $\theta$  

                = cos $\theta$ / sin $\theta$  

 
 tan $\theta$ = sin $\theta$ / cos $\theta$  

https://www.desmos.com/calculator/cxffgjxejh