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+1
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1
avatar+209 

What is the frequency of the function f(x)?

 

f(x) = 3 cos (π x) -2

 

express the answer in fracton form

 Jan 28, 2019
 #1
avatar+95866 
+1

In the form   f(x) = Acos (Bx) + D

 

B =   pi  = the number of periods in 2pi

 

So

 

B = 2pi / period

 

pi  =  2pi / period        rearrange  as

 

period =  2pi / pi    =  2

 

And the frequency  =   1 /period  =   1/2

 

 

cool cool cool

 Jan 28, 2019

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