As a standalone they will probably not be sufficient, they will at least have to be coupled with additional separation, e.g. chromatography. Using them on an unseparated extract will most likely lead to a forest of peaks in which you won't be able to find anything.

Next, even if you manage to separate the extract into stages with only one species per stage, vibrational spectroscopy can be sufficient, but it doesn't have to; eventually, additional NMR may be required.