+0  
 
-1
450
1
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solved.

 Dec 5, 2018
edited by Guest  Dec 5, 2018
 #1
avatar+36916 
0

Amplitude will be  ONE because there is no multiplier in front of   cos 4x

 

period will be 1/4 of original   =   pi/2

 Dec 5, 2018

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