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In a triangle,prove that sin 3A sin(B-C)+sin 3Bsin(C-A)+sin3C(A-B)=0

SHAIKH SHAMIM AKHTAR , 10 Years ago
Grade 12th pass
anser 2 Answers
Saurabh Koranglekar
Dear student

Please find the link below

https://www.askiitians.com/forums/Trigonometry/in-a-triangle-abc-prove-that-sin3asin-b-c-sin3bsi_118942.htm

Regards
Last Activity: 6 Years ago
Vikas TU
Dear student 
Dear student
Please approach using
( Sin A/ a) = ( sin B / b ) = ( sin C / c) = k
Expand sin 3A = 3ak - 4 ( ak)^3
If doubt still persists kindly revert for complete solution
Regards
Last Activity: 6 Years ago
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