| Quaternion fractals based upon trigonometry functionsWritten by Paul BourkeInspired by Shawn Halayka and Ricardo Fariello September 2021 
 
  zn+1 -> c sin(zn) 
 
  zn+1 -> c cos(zn) 
 
  zn+1 -> c sin(zn) 
 
  zn+1 -> sin(zn2) + c 
 
  zn+1 -> cos(zn2) + c sin(zn) 
 
  
 
  
 
  
 
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