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OpenStudy (anonymous):
find all (x,y): sinx+siny=sin(x+y) and |x|+|y|=1
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OpenStudy (anonymous):
sinx+siny=sin(x+y)=sinxcosy+cosxsiny so cosx=cosy=1 so x=y=0 I don't see how modulus x + modulus y can equal one though...
OpenStudy (anonymous):
absolutely wrong!
OpenStudy (anonymous):
Lol, ok then, how?
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