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Byju's Answer
Standard XII
Mathematics
Trigonometric Ratios of Compound Angles
Let tan A = p...
Question
Let
tan
A
=
p
(
p
–
1
)
and
tan
B
=
1
(
2
p
–
1
)
,
if
A
,
B
∈
(
0
,
π
/
2
)
then
A
–
B
can be
A
π
2
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B
π
4
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C
π
3
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D
π
6
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Solution
The correct option is
B
π
4
Given,
tan
A
=
p
(
p
–
1
)
and
tan
B
=
1
(
2
p
–
1
)
We know that,
tan
(
A
−
B
)
=
tan
A
−
tan
B
1
+
tan
A
tan
B
=
p
(
p
–
1
)
−
1
(
2
p
–
1
)
1
+
p
(
p
–
1
)
1
(
2
p
–
1
)
=
(
2
p
2
–
2
p
+
1
)
(
2
p
2
–
2
p
+
1
)
=
1
=
tan
π
4
⇒
(
A
−
B
)
=
π
4
Suggest Corrections
0
Similar questions
Q.
Let
tan
A
=
p
(
p
–
1
)
and
tan
B
=
1
(
2
p
–
1
)
,
if
A
,
B
∈
(
0
,
π
/
2
)
then
A
–
B
can be
Q.
Let
tan
A
=
p
(
p
–
1
)
and
tan
B
=
1
(
2
p
–
1
)
,
if
A
,
B
∈
(
0
,
π
/
2
)
then
A
–
B
can be
Q.
If
tan
A
=
−
1
2
and
tan
B
=
−
1
3
. (where
A
,
B
>
0
), then
A
+
B
can be
Q.
Assertion :If tan A, tan B are the roots of equation
x
2
−
p
x
−
1
=
0
, then
sin
2
(
A
+
B
)
=
p
2
1
+
p
2
Reason:
sin
2
(
A
+
B
)
=
t
a
n
2
(
A
+
B
)
1
+
t
a
n
2
(
A
+
B
)
Q.
Inverse circular functions,Principal values of
s
i
n
−
1
x
,
c
o
s
−
1
x
,
t
a
n
−
1
x
.
t
a
n
−
1
x
+
t
a
n
−
1
y
=
t
a
n
−
1
x
+
y
1
−
x
y
,
x
y
<
1
π
+
t
a
n
−
1
x
+
y
1
−
x
y
,
x
y
>
1
.
(a)
s
i
n
−
1
(
3
x
/
5
)
+
s
i
n
−
1
(
4
x
/
5
)
=
s
i
n
−
1
x
(b)
c
o
s
−
1
x
+
s
i
n
−
1
(
1
2
x
)
=
π
6
(c) If
a
≤
t
a
n
−
1
(
1
−
x
1
+
x
)
≤
b
where
0
≤
x
≤
1
then
(
a
,
b
)
=
(a)
(
0
,
π
)
(b)
(
0
,
π
/
4
)
(c)
(
−
π
/
4
,
π
/
4
)
(d)
(
π
/
4
,
π
/
2
)
(d) If
a
≤
(
s
i
n
−
1
x
)
3
+
(
c
o
s
−
1
x
)
3
≤
b
then (a,b) is equal to
(
π
3
32
,
7
π
3
8
)
.
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