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Byju's Answer
Standard XII
Mathematics
First Principle of Differentiation
If ∫01cot-1...
Question
If
∫
1
0
c
o
t
−
1
(
1
−
x
+
x
2
)
d
x
=
λ
∫
1
0
t
a
n
−
1
x
d
x
then
λ
is equal to
A
1
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B
2
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C
3
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D
4
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Solution
The correct option is
B
2
∫
1
0
c
o
t
−
1
(
1
−
x
+
x
2
)
d
x
=
∫
1
0
t
a
n
−
1
(
x
+
(
1
−
x
)
1
−
x
(
1
−
x
)
)
d
x
∫
1
0
t
a
n
1
x
d
x
+
∫
1
0
t
a
n
−
1
(
1
−
x
)
d
x
=
2
∫
1
0
t
a
n
−
1
x
d
x
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0
Similar questions
Q.
If
2
∫
1
0
tan
−
1
x
d
x
=
∫
1
0
cot
−
1
(
1
−
x
+
x
2
)
d
x
, then
∫
1
0
tan
−
1
(
1
−
x
+
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)
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Q.
If
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−
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+
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)
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