Fix two jagged lines

[Nikonlover]

Good evening,

I created this flag (click for larger version, original is 1800 x 1080 pixels):



The lines of the white triangle however are very jagged. Would it be possible for someone to make those lines smooth without changing other details of this picture?

Your help would be greatly appreciated. I hope that someone can help me further.

Best regards,

 

[ALB68]

I made this into a vector. It's in PDF format. You can check it out and download it if you want at https://www.dropbox.com/s/66zlrwm1p71hc58/PSG Line fix.pdf?dl=0

 

[Nikonlover]

I made this into a vector. It's in PDF format. You can check it out and download it if you want at (I cannot post links yet)

Thank you very much for your efforts. It turned out very nice.

Best regards!