Mark the correct alternative in the following:
The range of 
is
we know, -1≤cosx≤1
-2≤-2cosx≤2
-1≤(1-2cosx)≤3
So, R(f)=[-1, 1/3]
Option ..B
1
Mark the correct alternative in the following:
The range of is
we know, -1≤cosx≤1
-2≤-2cosx≤2
-1≤(1-2cosx)≤3
So, R(f)=[-1, 1/3]
Option ..B