We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
158
1
avatar+315 
 Feb 14, 2019
edited by Melody  Feb 14, 2019
 #1
avatar+102763 
+1

The wavelength here is    \(\pi \)   and that is the only transformation from the parent function of   y=cos x

 

If y= cos nx   then the wavelength will be     \(\frac{2\pi}{n}\)

 

so     

\(\frac{2\pi}{n}=\pi\\ \frac{2}{n}=1\\ n=2\)

 

So it must be      \(y=cos(2x)\)

 

Check by using Desmos graphing calculator.

Desmos is another tool that is very easy to use and very helpful to you. 

 

https://www.desmos.com/calculator/t7prurevsn

 Feb 14, 2019

5 Online Users