In all honesty without knowing how much you trimmed and what your plants look like it will be hard to tell, however you probably have not killed your plants. You have most likely severly inhibited there ability to produce photosynthisis. Big fan leaves are like giant batteries that fuel and contribute to growth. So if you just took the big leaves you took the big batteries out of the flashlight, it will not turn the light off just dim it signifigantly.
So your plants will most likely still grow, assuming you didnt trim them naked, just at a much slower rate until they can grow some new "batteries"
Hope this helps, pictures would help tremendously