I am out of time..so cant draw this...but surely I cna give the theory..
[tanx+sinx]=1
=>[tanx+sinx]-1=0
=>[tanx+sinx-1]=0
now first plotting tanx+sinx-1 and then using property to plot [tanx+sinx-1] we get the graph[1]
now [tanx+sinx-1]=0 will give us the reqd inteval