If x cos α +y sin α = P is a tangent to the ellipse x^2/a^2+y^2/b^2 = 1, then ?

Correct Answer is : a2cos2 α + b2 sin2α = P2

a^2cos^2 α + b^2 sin^2α = P^2

a^2 sin^2 α + b^2 cos^2 α = P^2

BITSAT 2019 Paper

Section: Mathematics

Question : 81 of 150

Marks: +1, -0

If x cos α +y sin α = P is a tangent to the ellipse

= 1, then ?

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