code: public static void multiply(ComplexPolar_F64 a, ComplexPolar_F64 b, ComplexPolar_F64 result)
      {
          result.r = a.r*b.r;
          result.theta = a.theta + b.theta;
      }
docs: Division in polar notation.
  
  @param a Complex number in polar notation. Not modified.
  @param b Complex number in polar notation. Not modified.
  @param result Storage for output.