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solve[scos(h)=r-1/2(g+b),ssin(h)=(g-b)sqrt(3/4),r+g+b=3I] for r,g,b
solve[scos(h)=r-1/2(g+b),ssin(h)=(g-b)sqrt(3/4),r+g+b=3I] for r,g,b
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