Arihant Plane Trigonometry Part 1 by SL Loney

Topics covered:

• Measurement of angles:
• Sexagesimal and Centesimal Measure Circular or Radian, 
• Measure Trigonometrical Ratios for Angles Less Than A Right Angle values
• Simple Problems In Height & Distance
• Applications of Algebraic Signs to Trigonometry
• Tracing the Changes In The Ratios
• Trigonometrical Ratios of Any Size & Sign
• General Expressions for All Angles Having a Given Trigonometrical Ratio
• Trigonometrical Ratios of The Sum & Difference Of Two Angles Product Formulae
• Trigonometrical Ratios of Multiple and Submultiple Of Angles 
• Explanation Of Ambiguities
• Identities and Trigonometrical Equations
• Logarithms
• The Principle Of Proportional Parts
• Relations Between Side &Trigonometrical Ratios Of The Angles Of A Triangle
• Solution To Triangles
• Heights & Distances
• Properties Of A Triangle
• Quadrilaterals
• Trigonometrical Ratio
• Inverse Circular Functions
• Summation Of Some Simple Trigonometrical Series
• Elimination, Projections
• Miscellaneous Examples, Answers, 
• Five-Figure Logarithmic And Trigonometrical Tables