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+0  
 
-1
64
2
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http://prntscr.com/mblu9p

 Jan 24, 2019
 #1
avatar+18017 
+1

No....sorry.     3 is the amplitude of the modulated wave.    Normal midline for a cos wave is y = 0  .  This wave is SHIFTED DOWNWARD by 2.5 so the midline woudl be at  y = -2.5 .

 Jan 24, 2019
 #2
avatar+100103 
+1

You can check your own graphs with this calculator   wink

 

https://www.desmos.com/calculator

 Jan 24, 2019

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