Therefore, f is increasing in 0, 6
π



  and decreasing in 
,
6 2
π π




 Fig 6 5
Rationalised 2023-24
APPLICATION OF DERIVATIVES
157
Also, the given function is continuous at x = 0 and 
6
x
=π Therefore, by Theorem 1,
f is increasing on 0 6
, π

  and decreasing on 
π π
6 2
,


