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Byju's Answer
Standard X
Mathematics
Quadratic Formula
If in ABC, ...
Question
If in
△
A
B
C
,
sin
A
sin
C
=
sin
(
A
−
B
)
sin
(
B
−
C
)
,
Prove that
a
2
,
b
2
,
c
2
are in
A
.
P
.
Open in App
Solution
sin
A
=
sin
(
B
+
C
)
or
∴
sin
2
B
−
sin
2
C
=
sin
2
A
−
sin
2
B
or
2
b
2
=
a
2
+
c
2
by sine rule
∴
a
2
,
b
2
,
c
2
are in
A
.
P
.
Suggest Corrections
1
Similar questions
Q.
In any triangle
A
B
C
if
sin
A
sin
C
=
sin
A
−
B
sin
B
−
C
prove that
a
2
,
b
2
and
c
2
are in A.P.
Q.
If in a triangle ABC,
sin
A
sin
C
=
sin
(
A
−
B
)
sin
(
B
−
C
)
, then show that
a
2
,
b
2
,
c
2
are in A.P.
Q.
If
sin
A
sin
C
=
sin
(
A
−
B
)
sin
(
B
−
C
)
,
then
a
2
,
b
2
,
c
2
are in
Q.
l
n
Δ
A
B
C
,
I
f
S
i
n
A
S
i
n
C
=
S
i
n
(
A
−
B
)
S
i
n
(
B
−
C
)
then
a
2
,
b
2
,
c
2
are in
Q.
In any
△
A
B
C
, prove that
√
sin
A
−
√
sin
B
√
sin
A
+
√
sin
B
=
a
+
b
−
2
√
a
b
a
−
b
(Hint:
(
a
−
b
)
2
=
a
2
+
b
2
−
2
a
b
)
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