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If cosA + cosB + cosC = sinA + sinB + sinC = O, then the value ofcos(2A-B-C) + cos(2B-A-C)+cos(2C-A-B)is ____.Can this question be solved with the help of the concept of complex numbers?

sree charan R , 12 Years ago
Grade 12
anser 1 Answers
Sumit Majumdar

Last Activity: 10 Years ago

Hello student,
Please specify if A, B, C are angles of a triable itself.
This can be done using complex numbers provided we have some relation between A, B and C being the angles of a triangle.
Thanks & Regards
Sumit Majumdar,
askIITians Faculty
Ph.D,IIT Delhi

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