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