Need help with Grapher

[Chocoman150]

Hi,

I got this task about Fourier series and im trying to solve it with Grapher
Im trying to fill in this function:

TF being 3π and fF 1/3π

And I'm doing it this way in grapher:

and its not working and i dont know what im doing wrong, as its the first time im using grapher

please help

 

[YB24]

Fourier Serie

Hi !
See attachment : is that your serie ?
For more stuff about Grapher (mainly French and mathematical usual signs) you may use this website (all free)
< http://y.barois.free.fr/grapher/Bienvenue.html >
(manual, bugs, lot of .gcx files).
Enjoy, YB24