Question

The angle between the diagonals of aquadrilateral formed by the lines(х/a)+(y/b) .=1;(x/b)+(y/a)=1;(x/a)+(y/b)=2;(x/b)+(y/a)=2is​

Answer 1

+by=1,bx+ay=1,bx+ay=2,bx+ay =2 is. Answer.

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