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Problem
Problem
If in triangle ABC,
a
,
b
,
c
a, b, c
a
,
b
,
c
and angle A are given and
c
sin
A
<
a
<
c
c \sin A < a < c
c
sin
A
<
a
<
c
, then
(
b
1
and
b
2
are values of
b
)
(b_1 \text{ and } b_2 \text{ are values of } b)
(
b
1
and
b
2
are values of
b
)
a.
b
1
+
b
2
=
2
c
cos
A
b_1 + b_2 = 2c \cos A
b
1
+
b
2
=
2
c
cos
A
b.
b
1
+
b
2
=
c
cos
A
b_1 + b_2 = c \cos A
b
1
+
b
2
=
c
cos
A
c.
b
1
b
2
=
c
2
−
a
2
b_1 b_2 = c^2 - a^2
b
1
b
2
=
c
2
−
a
2
d.
b
1
b
2
=
c
2
+
a
2
b_1 b_2 = c^2 + a^2
b
1
b
2
=
c
2
+
a
2
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