Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Let A = 
and B = 
then –
A
At x = 
, A + B = 1
, A + B = 1
B
A + B = 1 for all x in 
C
A + B = 1 for all x in 
and 2 for all x in 
and 2 for all x in
D
A = B for all x
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, b)
Let A + B = f(x)
= 
+ 
⇒ f ' (x) = 
. sec 2 x
+ 
= 0
⇒ f(x) is constant ⇒ f(x) = f 
⇒ f(x) = 
+ 
= 1
⇒ f(x) = 1 for all x in 
∴ A, B are correct
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