1.

All the point (a, y) in the plane satisfying the equation x^(2)+2x sin (xy)+1=0 lie on -

Answer»

a pair of STRAIGHT lines
a family of hyperbolas
a parabola
an ellipse

Solution :`X^(2)+2x sin (xy) +1=0`
`2 sin (xy) = -(x+1/x)`

`y=2npi//(PI)/(2), ninI`
HENCE pair of straight lines.


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