Trigonometry (Maths- Higher)

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The three formulae: sin, cos, tan

Hypotenuse- is the longest side and is always opposite to the right angle.

Opposite & adjacent- sides relate to the angle under considerate

The are three formulae involved in trigonometry:

sin= opposite / hypotenuse

cos= adjacent / hypotenuse

tan= opposite / adjacent

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Which formula to use?

There are a couple of ways to help you remember which formulae to use.

  • remember SOHCAHTOA (pronouce sock-ka-toa)


  • Some Old Hag Cracked All Her Teeth On Apples
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