Problems Involving Right Triangles

• Angle of elevation


  The angle from your eye level when looking at an object higher than you
• Angle of depression


  The angle from your eye level when looking at an object lower than you
• Trigonometric ratios


  • Sine
  • Cosine
  • Tangent
  • Secant
  • Cosecant
  • Cotangent
• A 20 feet ladder should not incline more than 70 degree angle with the ground
• Problem solving with right triangles

  1. Understand the problem

  2. Develop a plan

  3. Implement the plan

  4. Look back and check
• Cosine


  Adjacent/Hypotenuse
• Sine

  Opposite/Hypotenuse
• Tangent


  Opposite/Adjacent