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Contests
National and Regional Contests
India Contests
India National Olympiad
1992 India National Olympiad
1
1
Part of
1992 India National Olympiad
Problems
(1)
Find relation in triangle
Source: INMO 1992 Problem 1
10/3/2005
In a triangle
A
B
C
ABC
A
BC
,
∠
A
=
2
⋅
∠
B
\angle A = 2 \cdot \angle B
∠
A
=
2
⋅
∠
B
. Prove that
a
2
=
b
(
b
+
c
)
a^2 = b (b+c)
a
2
=
b
(
b
+
c
)
.
trigonometry
algebra
highschoolmath
trig identities