Function question 3 for powerplay

maybe my glb is wrong , but sure of the lub it's 1. I'll try and tell.

sir wat abt the 6th and the 8th post,no background

range of

1) sin(cos(tan x)))=[-1,1]

2) cos(sin(tan x)))=[-1,1]

3) tan(cos(sin x)))=[-∞,∞]?

Tanx has a range (-∞,∞)
so the angle for Sin has all values
so Sin wil give values from [-1,1]
Now Cos is an even function and increases from [-1,0),and decreases from [0,1]
so max at 0 and min at 1or -1 that is cos1
draw the graph machan u will get it

How? [7]

1) [sin-1, sin1]

2) [cos(-1) , cos(1) ]

sky wont the cos(-1)=cos(1)

3.) [tan(cos-1), tan(cos1)]

2)[cos1,1]

[12]