1.

Point P(x,y) satisfying the equation sin^(-1)x+cos^(-1)y+cos^(-1)(2xy)=(pi)/2 lies on

Answer»

the BISECTOR of the first and third quadrant
bisector of the SECOND and fourth quadrant.
the rectangle FORMED by the LINES `x=+-1` and `y=+-1`
a unit circle with CENTRE at the origin.

Answer :D


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