The angle between the curves `y=x, y=1//x` at (1, 1) is

The angle between the curves y^2=x,x^2=y at (1, 1) is

The acute angle between the curve y^2=x and x^2=y at (1,1) is

If theta is the angle between the curves y=x^2,x=y^2 at (1,1), than tan theta =

The angle between the curves y=x^2 and y=4-x^2 is

The angle between the curves y=x^2 and y=4-x^2 is

The angle between the curves x^2=4y,x^2+y^2=5 at (-2, 1) is

The angle between the curves y= sin x and y= cos x is-

The angle between the curves y^(2) =x and x^(2) = y at (1,1) is

If the angle between the curves x^(2)y=1 and y=e^(2(1-x)) at the point (1,1) is theta, then tan theta is equal to