+0  
 
+1
128
3
avatar

I have hard time with trig

 

Find the 3 smallest positive x-intercepts of the graph of

y = cos 12x + cos 16x + cos 20x
and list them in increasing order.

 Jan 27, 2023
 #1
avatar+163 
0

Since you are looking for an x intercept you can set y = 0

this looks like trig identities

https://www2.clarku.edu/faculty/djoyce/trig/identities.html should help

 Jan 27, 2023
 #2
avatar
0

This answer is useless.

 

I think I'll wait and get advice from someone who doesn't completely \(\text{su} \text{ck}\) at math.

Guest Jan 28, 2023
 #3
avatar+33574 
+1

As follows:

 

 Jan 29, 2023

2 Online Users

avatar