JEE Advanced | 2013Progression (Sequence and Series)Hard
Question
The value of cot 
cot-1 
is
cot-1 isOptions
A.
B.
C.
D.
Solution
cot cot-1
= cot
= cot
= cot
= cot (tan-1 24 - tan-11)
= cot
= cot 
cot-1 = cot
= cot
= cot
= cot (tan-1 24 - tan-11)
= cot
= cot Create a free account to view solution
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