4. Let P be any point on the ellipse E: 25 = 1. (i) Show that the equation of the tangent at P: = 3x cos 0 + 5y sin 0 - (5 cos 0, 3 sin 0) is 15. (ii) Assume that 0 < 0 < π. The tangent at the vertex A = (5,0) on the major axis meets the tangent at P at the point R. If O is the origin, show that OR is parallel to A'P where A' = (–5,0) the opposite vertex to A.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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4. Let P be any point on the ellipse E:
x² y²
+
25 9
(i) Show that the equation of the tangent at P = (5 cos 0, 3 sin ) is
3x cos 0 + 5y sin 0 = 15.
-
1.
(ii) Assume that 0 < 0 < π. The tangent at the vertex A
=
(5,0) on the major
axis meets the tangent at P at the point R. If O is the origin, show that OR
is parallel to A'P where A' = (-5,0) the opposite vertex to A.
Transcribed Image Text:4. Let P be any point on the ellipse E: x² y² + 25 9 (i) Show that the equation of the tangent at P = (5 cos 0, 3 sin ) is 3x cos 0 + 5y sin 0 = 15. - 1. (ii) Assume that 0 < 0 < π. The tangent at the vertex A = (5,0) on the major axis meets the tangent at P at the point R. If O is the origin, show that OR is parallel to A'P where A' = (-5,0) the opposite vertex to A.
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