Prove that in a triangle ABC,
a^3 . cos(B-C) + b^3 . cos(C-A) + c^3 . cos(A-B) = 3abc.
SOLUTION :
a^3 . cos(B-C) + b^3 . cos(C-A) + c^3 . cos(A-B) = 3abc.
[IIT 1970; IC 1983]
SOLUTION :
Saturday, 30 March 2013
Properties of Triangles (This question is based on Properties of Triangles), Prove that in a triangle ABC, a^3 . cos(B-C) + b^3 . cos(C-A) + c^3 . cos(A-B) = 3abc.
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