Whenever x is an integer [x] is also integer that is equal to x only.
Similarly [cotx]=cotx, when cotx is an integer.
No bhayya in solution it is given if x is an integer,then giv of cotx is integer.Plzz see solution once more and if you get plzz explain it to me.
No no, it will be like this
If cotx is an integer then only [cotx] can be written like it.
Ok thnx bhayya I now understand.