Plotting Functions and Curves

• Define command:
  \newcommand{\Percentage}[2]{
   \pgfmathparse{int(round(100*#2/#1))}
   \let\crel\pgfmathresult;
}
  
• Define RGB color:
  \definecolor{color1}{rgb}{1,0,0} %red
\definecolor{color2}{rgb}{0,0,1} %blue
  
• Change the Color:
  \tikzstyle{Curve}=[
   ---
   color=color1!\percent!color2,
   ---
];
  
• Plot:
  \draw
   [
      Curve,
      %rotate=\Angle, %rotates around (0,0)
      rotate around={\Angle:(C)}
   ]
   plot
   (
      {\CX+\a*cos(\t)},
      {\CY+\b*sin(\t)}
   );