Hello there. I'm new to this forum so I apologise in advance if what I have posted seems a little unclear to you. I just need a little help with the following question.

If, sinhy = (4sinhx - 3) / (4 + 3sinhx)

show that,

dy/dx = -5 / (4 + 3sinhx)

My final answer contains coshy, and I do not know where to go from there to get the above.

Thanks in advance.