## An Elementary Treatise on Trilinear Co-ordinates: The Method of Reciprocal Polars, and the Theory Projections |

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Page

The Method of

Ferrers. DI ROMA " LA SAPIENZA " III 3 35 BIBLIOTECA MATEMATICA " G.

CASTELNUOVO مه - ل - | 1 5 7 1 TRILINEAR. UNIVERSITAS.

The Method of

**Reciprocal**Polars, and the Theory Projections Norman MacleodFerrers. DI ROMA " LA SAPIENZA " III 3 35 BIBLIOTECA MATEMATICA " G.

CASTELNUOVO مه - ل - | 1 5 7 1 TRILINEAR. UNIVERSITAS.

Page iii

The Method of

Ferrers. ll AN ELEMENTARY TREATISE ON TRILINEAR CO - ORDINATES , THE

METHOD OF

The Method of

**Reciprocal**Polars, and the Theory Projections Norman MacleodFerrers. ll AN ELEMENTARY TREATISE ON TRILINEAR CO - ORDINATES , THE

METHOD OF

**RECIPROCAL**POLARS , AND THE THEORY OF PROJECTIONS . Page vii

The Method of

Ferrers. CONTENTS . CHAPTER I. TRILINEAR CO - ORDINATES . EQUATION

OF A STRAIGHT LINE . ARTE , PAGE I. I 2 . 4 II I 2 . 10 . II . I 2 . 13 . DEFINITION

of ...

The Method of

**Reciprocal**Polars, and the Theory Projections Norman MacleodFerrers. CONTENTS . CHAPTER I. TRILINEAR CO - ORDINATES . EQUATION

OF A STRAIGHT LINE . ARTE , PAGE I. I 2 . 4 II I 2 . 10 . II . I 2 . 13 . DEFINITION

of ...

Page x

The Method of

Ferrers. ARTS . PAGE 17 . 87 89 18 . 19 . Locus of the intersection of two

Tangents at right angles to one another . Directrix of a Parabola To find the

magnitudes of ...

The Method of

**Reciprocal**Polars, and the Theory Projections Norman MacleodFerrers. ARTS . PAGE 17 . 87 89 18 . 19 . Locus of the intersection of two

Tangents at right angles to one another . Directrix of a Parabola To find the

magnitudes of ...

Page xi

The Method of

Ferrers. CHAPTER VII . TANGENTIAL CO - ORDINATES . RTS . PAGE I. 119 ib .

2 . I 21 4 . I 22 . 124 Definition of the Tangential Co - ordinates of a Straight Line ...

The Method of

**Reciprocal**Polars, and the Theory Projections Norman MacleodFerrers. CHAPTER VII . TANGENTIAL CO - ORDINATES . RTS . PAGE I. 119 ib .

2 . I 21 4 . I 22 . 124 Definition of the Tangential Co - ordinates of a Straight Line ...

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### Common terms and phrases

angle angular points appears Author become BOOKS called Cambridge centre Chap chapter chord circle cloth co-ordinates coefficients coincide College common condition conic conic section considered constant corresponding Crown 8vo curve denoted described determine distance draw drawn eliminating equal equation Examples expressed find the equation fixed point focus follows given point given straight line gives harmonic Hence imaginary line at infinity locus meet observed obtained opposite sides pair parabola parallel passing pencil perpendicular point of intersection points of contact polar pole positive produced projection prove ratio reciprocal relation represented respect result right angles satisfy Schools second degree sides similar Similarly student taken tangents term theorem third three points tion touch Treatise triangle of reference values whence writing written