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avatar+44 

cos (4pi/3)  =  cos (240°)  =  - cos (60°)  =  -1/2 how could i sketrch this

 May 16, 2020
 #1
avatar+94 
0

Hi,

 

there is a website called desmos, desmos.com/calculator, a graphing calculator that will help you graph that problem. 

 May 16, 2020
 #2
avatar+2419 
+1

Here is a sketch:

 

 

\(\frac{4\pi}{3}\) lies between \(\pi\) and \(\frac{3\pi}{2}\), so the terminal side lands in the third quadrant.

 May 16, 2020

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