Trigonometry

• Sin = opposite/hypotenuse
• Cos = adjacent/hypotenuse
• Tan = opposite/adjacent
• What is the cosine rule?

  a squared = b squared + c squared - 2bc cos(A)
• What is the sine rule?

  a/sin A = b/sin B = c/sin C
• sin 0°

  0
• sin 30°

  0.5
• sin 45°

  1/√2
• sin 60°

  √3/2
• sin 90°

  1
• cos 0°

  1
• cos 30°

  √3/2
• cos 45°

  1/√2
• cos 60°

  0.5
• cos 90°

  0
• tan 0°

  0
• tan 30°

  1/√3
• tan 45°

  1
• tan 60°

  √3
• tan 90°

  undefined