Trigonometry

Trigonometry

1. scale drawings

2. Angle of elevation

3. angle of depression

4. bearing

5. tangent

   • tan A= opp/adj

6. sine and cosine

   • sin(A)= opp/hyp
   • cos(A)= adj/hyp

7. SOH CAH TOA

8. sin O = +sin (180 - O)

   • cos O= -cos (180 -O)

9. sine rule

   • sinA/a= sinB/b= sinC/c

10. cosine rule

    • a^2=b^2+c^2- 2bc cosA

11. Area of a triangle

    • area=1/2 x base x perpendicular height

12. Trigonometry in three dimensions