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Find Amplitude of the following function..

 

y=2.5cos(4x)cos(4x)-2.5sin(4x)sin(4x)

 Oct 13, 2019
 #1
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+2

y=2.5cos(4x)cos(4x)-2.5sin(4x)sin(4x)

 

We can use an identity to  write this as

 

y  =  2.5cos (4x + 4x)   =   2.5cos(8x)

 

The amplitude  is  2.5

 

cool cool cool

 Oct 13, 2019

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