trigonometry

• sin(x) = opposite/hypotenuse
• cos(x) = adjacent/hypotenuse
• tan(x) = opposite/adjacent
• adjacent = side with both right angle and angle

  hypotenuse = opposite right angle

  opposite = opposite the angle

  
• SOH - sin - opposite / hypotenuse

  CAH - cos = adjacent / hypotenuse

  TOA - tan = opposite / adjacent
• sin(30)


  1/2
• sin(60)


  root3/2
• sin(45)


  1/root2
• cos(30)


  root3/2
• cos(60)


  1/2
• cos(45)


  1/root2
• tan(30)


  1/root3
• tan(60)


  root3
• tan(45)


  1
• sin(0)


  0
• sin(90)


  1
• cos(0)


  1
• cos(90)


  0
• tan(0)


  0
• tan(90)


  undefined - infinity ?