,. it 



ugh a given external point two tangeuu to a ooolc can 



4WII . . 



i chord of contact 



909 



nlal Uieorem 



nrti-r uf a rniie aeeiion .'11 



180. Equation of a conic that paaiai through th intersection* of 

 two given conies . 



I ultion oftk* Conic Section* 



Polar equation of UM oonie . . '.'II 



132. From the polar equation of a conic to trace the curve . . 216 



( 11 API 



TIIK PARABOLA y* = I 



Review 



"f the parabola 220 



The equation of the tangent to the parabola y f =4/> 



terms of iu slope . . Jjl 



136. The equation of the normal to the parabola jr f = 4 p . 



terms of its slope 

 Subtangent and subnormal. Construction of tangent and 



n..riM.il I.'-'-' 



138. Some properties of the parabola whirli involve tangents and 



normals 



1MO 



-M of the parabola involving diameters . . 232 

 111 1 1.. , latkM of a parabola referred to any diameter and 



the tangent at its extremity as axes .... 233 



X 

 Tin I'.i i ii -K + ?- = 1 



Or 6* 



Review 237 



The equation of the tangent to the ellipse S + *j = 1 in 



fl* Or 



terms of its Mope .918 



1 II. 'lii.- Sinn of i fiical dUtances of any point on an ellipse 

 b constant; it is equal to the major axis 



