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sinxcosy+cosxsiny = … … …...

`sinxcosy+cosxsiny = … … … `

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If Delta=|(sinx.cosy,sinx.siny,cosx),(cosx.cosy,cosx.siny,-siny),(-sinxsiny,sinx.cosy,0)| , then Delta is independent of a)x b)y c)constant d)None of these