Trigonometry and precalculus
Basic Trigonometry

Basic trigonometric ratios

  1. Basic Trigonometry
  2. Trigonometry 0.5
  3. Basic Trigonometry II
  4. Trigonometry 1
  5. Example: Using soh cah toa
  6. Example: The six trig ratios
  7. Reciprocal trig functions
  8. Example: Using trig to solve for missing information
  9. Trigonometry 1.5
  10. Example: Calculator to evaluate a trig function
  11. Example: Trig to solve the sides and angles of a right triangle
  12. Trigonometry 2
  13. Example: Solving a 30-60-90 triangle
  14. Special right triangles
Additional content

Reciprocal trig functions Understand the right triangle definition of sec, csc, and cot functions