* @param ctx the function context.
* @return the complex conjugate of a complex number.
*/
public static Object engineerImconjugate(Object[] args, XelContext ctx) {
Complex complex = UtilFns.validateComplex(args[0].toString());
return UtilFns.cToComplex(complex.conjugate(), complex.getSuffix());
}
/**
* Returns the cosine of a complex number.
* This function implements the IMCOS(arg0) spreadsheet function.