1.

Evaluate the following determinants.[[1,x,y],[0,sinx,siny],[0,cosx,cosy]]

Answer»

Solution :`[[0,x,y],[0,sinx,SINY],[0,COSX,COSY]]=1[[sinx,siny],[cosx,cosy]]`
=sinxcosy-cosxsiny=sin(x-y).


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