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Homework Statement
if A+B+C=π, prove that asin(B-C)+bsin(C-A)+csin(A-B)=0
Homework Equations
sin(x-y)=sinxcosy-cosxsiny
The Attempt at a Solution
I tried to expand but to no avail. Any help is appreciated.
Here are some advices:Homework Statement
if A+B+C=π, prove that asin(B-C)+bsin(C-A)+csin(A-B)=0
Homework Equations
sin(x-y)=sinxcosy-cosxsiny
The Attempt at a Solution
I tried to expand but to no avail. Any help is appreciated.