if the line `xcosalpha+ysinalpha=p` is normal to the ellipse `x^2/a^2+y^2/b^2=1` then

The line xcosalpha+ysinalpha=p is a tangent to the ellipse x^(2)//a^(2)+y^(2)//b^(2)=1 . The point of contact is

Find the condition for the line x cos alpha +y sin alpha =p to be a tangent to the ellipse x^2/a^2+y^2/b^2=1 .

Prove that the line xcosalpha+ysinalpha=p touches the ellipse (x^2/a^2+y^2/b^2)=1 If p^2=a^2coas^2alpha+b^2sin^2alpha .

If the line x cos alpha+y sin alpha=p touches the ellipse x^(2)/a^(2)+(y^(2))/(b^(2))=1 then the point of contact will be

The line lx+my=n is a normal to the ellipse x^(2)/a^(2)+y^(2)/b^(2)=1

The line lx+my=n is a normal to the ellipse x^(2)/a^(2)+y^(2)/b^(2)=1

The line x cos alpha + y sin alpha = p is tangent to the ellipse (x^(2))/(a^(2)) +(y^(2))/(b^(2)) = 1 if :