- Trigonometric ratios of 45 degree
- Problem 1: Trigonometric ratios of 45 degree
- Trigonometric ratios of 30 degree and 60 degree
- Problem 1: Trigonometric ratios of 30 degree and 60 degree
- Problem 2: Trigonometric ratios of 30 degree and 60 degree
- Signs of Trigonometric Ratios in Different Quadrants
- Problem-Signs of Trigonometric Ratios in Different Quadrant
- Problem2-Signs of Trigonometric Ratios in Different Quadrant
- Trigonometric Functions for a Unit Circle
- Values of Remaining Trigonometric Ratios
- Values of Trigonometric Ratios at Quadrantal Angle
- Problem-Values of Trigonometric Ratios at Quadrantal Angle
- Values of Trigonometrical Ratios
- Use of Calculator
- Tables of Trigonometric Ratios
- Problem1-Tables of Trigonometric Ratios
- Problem2-Tables of Trigonometric Ratios
- Problem3-Tables of Trigonometric Ratios
- Problem4-Tables of Trigonometric Ratios

- Problem 1: when measures of hypotenuse and one angle are given
- Problem 1: When measures of two sides are given

- Solving Right-Angled Triangles Using Trigonometrical Ratios
- Problem 1: when one Side & Angle of Elevation are Given

- Concept of Angle of Elevation & Depression
- Problem 1: Concept of Angle of Elevation & Depression
- Engineering and Heights and Distances
- More on Engineering and Heights and Distances
- Problem1-Engineering and Heights and Distances
- Problem2-Engineering and Heights and Distances
- when one Side & Angle of Elevation are Given
- Problem-When one Side & Angle of Elevation are Given
- Problem 1: when one Side & Angle of Elevation are Given
- Problem 2: when one Side & Angle of Elevation are Given
- when One Side & Angle of Depression are Given
- Problem 1: when One Side & Angle of Depression are Given
- Problem2-when One Side & Angle of Depression are Given
- when Hypotenuse & Angle of Elevation are Given
- Problem 1: when Hypotenuse & Angle of Elevation are Given
- when Given Sides-Angle of Elevation-Depression
- Problem 1: when Given Sides-Angle of Elevation-Depression
- Problem 2: when Given Sides-Angle of Elevation-Depression