`y^(2)+(1)/(y^(2))` is not equal to

The expression (x+y)/(x-y)-:((x+y)^(2))/((x^(2)-y^(2))) is equal to -1( b) x-y( c) 1 (d) x+y is equal

The area of the loop of the curve x^(2)+(y-1)y^(2)=0 is equal to :

The area of the loop of the curve x^(2)+(y-1)y^(2)=0 is equal to :

If P(Y)=Y^(4)-Y^(2)+Y then P((1)/(2)) is equal to

Tangent at point P (a sec theta, b tan theta) to the hyperbola meets the auxiliary circle of the hyper­bola at points whose ordinates are y_(1) and y_(2) , then 4b tan theta(y_(1)+y_(2))/(y_(1)y_(2)) is equal to