<p>Table of Contents</p>
<p>1. Measurement of Angles: Sexagesimal, Centesimal and Circular Measure</p>
<p>2. Trigonometrial Ratio for Angles Less than a Right Angle</p>
<p>3. Simple Problems in Heights and Distances</p>
<p>4. Application on Algebraic Signs to Trigonometry</p>
<p>5. Trigonometrical Functions of Angles of any size and sign</p>
<p>6. General Expressions for all angles having a given trigonometrical ratio</p>
<p>7. Trigonometrical Ratio of the sum and difference of two angles</p>
<p>8. The Trigonometical Ratios of Multiple and Submultiple angles</p>
<p>9. Densities and trigonometical Equations</p>
<p>10. Logarithms</p>
<p>11. Tables of Logarithms and Trigonometrical Ratios Principle and Proportional Parts</p>
<p>12. Relations between the sides and the Trigonometrical Relations of the Anlges of any Triangle</p>
<p>13. Solution of Triangles</p>
<p>14. Heights and Distances</p>
<p>15. Properties of a Triangle</p>
<p>16. On Quadrilaterals and Regular Polygons</p>
<p>17. Trigonometrical Ratios of Small Angles, Areas of a Circle of Dip of the Horizon</p>
<p>18. Inverse Circular Functions</p>
<p>19. On Some Trigonometrical Series</p>
<p>20. Elimination</p>
<p>21. Projections</p>