Trigonometry

Trigonometry

1. Sin, Cos, Tan

   • Sides of a right angle Triangle
     • Opposite
       • the opposite die is the opposite the angle
       • opposite(cos)=adjacent/hypotenuse
     • Adjacent
       • the adjacent side is the side that is next to the angle but not the hypotenuse
       • adjacent(sin)=opposite/hypotenuse
     • Hypotenuse
       • the hypotenuse is opposite the right angle
       • hypotenuse(tan)=opposite/adjacent

2. Cosine Rule

   • Labelling the sides and angles of a triangle
     • Angles are labelled with upper case letters
     • Lengths are labelled using lower case letters
   • (a*a)=(b*b)+(c*c)-2bc*cosA

3. Sine Rule

   • a/SinA=b/SinB=c/SinC

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