Show that the product of perpendiculars on the line `x/a costheta+y/b s intheta=1` from the points `(+-sqrt(a^2-b^2),\ 0)i s\ b^2dot`

Explanation

Let p1​ and p2 be the lengths of perpendicular draw from point `P(sqrt(a^2−2^2)
​,0) `

`Q(−sqrt(a^2−2^2)
​,0)` on the line,

Then,

...