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Problem
Problem
In a
Δ
A
B
C
\Delta ABC
Δ
A
B
C
, let
B
C
=
1
,
A
C
=
2
BC = 1, AC = 2
B
C
=
1
,
A
C
=
2
and measure of
∠
C
\angle C
∠
C
is
30
∘
30^\circ
3
0
∘
. Which of the following statement(s) is(are) correct? a.
2
sin
A
=
sin
B
2 \sin A = \sin B
2
sin
A
=
sin
B
b. Length of side
A
B
AB
A
B
equals
5
−
2
3
5 - 2\sqrt{3}
5
−
2
3
c. measure of
∠
A
\angle A
∠
A
is less than
30
∘
30^\circ
3
0
∘
d. Circumradius of
∠
A
B
C
\angle ABC
∠
A
B
C
is equal to length of side
A
B
AB
A
B
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