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cosA+cosB+cosC=sinA+sinB+sinc find the value of cos(A-b)+cos(B-c)+cos(C-A)

cosA+cosB+cosC=sinA+sinB+sinc
find the value of

cos(A-b)+cos(B-c)+cos(C-A)
 

Grade:Select Grade

2 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

Please assume A,B,C to be pi/4

Solution is 0

Regards
Vikas TU
14149 Points
3 years ago
Dear student 
The soluton will not be zero , 
It will be 3 
Because Cos(pi/4 – pi/4) + Cos(pi/4 – pi/4) + Cos(pi/4 – pi/4) = 3 
Hope this will help 
Good Luck 

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