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 bythe lines `x=pm1 and y=pm1`.
a unit circle with CENTRE at the origin.

Answer :D


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