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.

Prove that in a triangle ABC,
                   a^3 . cos(B-C) + b^3 . cos(C-A) + c^3 . cos(A-B) = 3abc.

[IIT 1970;   IC 1983]

SOLUTION : 

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In a triangle ABC, Prove that asin(B-C) + bsin(C-A) + csin(A-B) = 0

In a triangle ABC, Prove that asin(B-C) + bsin(C-A) + csin(A-B) = 0 

[ISM 1973; BIT(Mesra)]

SOLUTION

BY : V K PANDEY

KEYWORDS :Geeks Networks, mathsmania, NCERT solved answers, trigonometric functions, trigonometry, 

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In any Triangle ABC, Prove that acos(B-C)/2 = (b+c)SinA/2.

 This Question is based on Properties of Triangle

In any Triangle ABC, Prove that  acos(B-C)/2 = (b+c)SinA/2.

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Very Very Important Question based on Properties of Triangle.

Very Very Important Question based on Properties of Triangle.

This Question has been asked in IIT 1970;JEE(WB) 91;Jh 2002...

Keywords : CBSE, Geeks Networks, NCERT solved answers, solved answers of mathematics of 11th class, trigonometry, trigonometric functions,

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