Question

All the point (a, y) in the plane satisfying the equation `x^(2)+2x sin (xy)+1=0` lie on -
A. a pair of straight lines
B. a family of hyperbolas
C. a parabola
D. an ellipse

Answer 1

Correct Answer - A
`x^(2)+2x sin (xy) +1=0`
`2 sin (xy) = -(x+1/x)`

`y=2npi//(pi)/(2), ninI`
Hence pair of straight lines.