The tangent at the point P(θ) on the ellipse x2/4+y2/3 = 1 passes through the point A(2, 1). Show that √3cosθ + sin θ = √3. Find all the solutions of this equation which are in the range 0 ≤ θ < 2π. Hence find the coordinates of the points of contact of the tangents to the ellipse from A.
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Expert's answer
2021-08-16T16:48:02-0400
4x2+3y2=1
x=2cosθ,y=3sinθ
yx′=xθ′yθ′=−2sinθ3cosθ
slope=−2sinθ3cosθ
y−3sinθ=−2sinθ3cosθ(x−2cosθ)
2sinθ(y−3sinθ)=−3cosθ(x−2cosθ)
The equation of the tangent line at the point P(θ) to the ellipse is
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