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Properties of Triangle
Hard
Question
In ᐃABC, a sin (B − C) + b sin (C − A) + c sin (A − B) =
Options
A.
0
B.
a + b + c
C.
a
2
+ b
2
+ c
2
D.
2(a
2
+ b
2
+ c
2
)
Solution
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Properties of Triangle
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