Apple Cider Vinegar can help treat the trichomoniasis but it cannot cure it.
You can add a cup or two of apple cider vinegar to a warm bath and soak in the warm bath for 30 minutes or so and do that everyday until the trichomoniasis clears up.
The apple cider vinegar can help ease the symptoms of trichomoniasis and help it go away much faster but it cannot cure it.
You can get some antibiotics through your doctor to help treat the trichomoniasis as well and make sure to shower daily and keep the area down there dry.
Some woman have soaked a tampon in some apple cider vinegar as well and then inserted the tampon into their vagina and they said that it helped the trichomoniasis go away sooner.
So if you're a female you might try that but there's no guarantee that it will get rid of it it.