Published by:
CGP EDU Academic Team
Published on: August 11, 2026
If u = cot –1 
– tan –1 
, then tan 
is equal to–
A
B
C
tan α
D
cot α
Text Solution
Verified by ExpertsThe correct answer is:
A
Let 
= tan x, then u = cot –1 (tan x) – tan –1 (tan x) = 
– x – x = 
– 2x
⇒ 2x = 
– u ⇒ x = 
– 
⇒ tan x = tan 
⇒ 
= tan 
.
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