1. 4.3 Right Triangle Trigonometry
Trigonometric Identities

2. The part of a Right Triangle with respect to an angle
Adjacent, Opposite and Hypotenuse.

3. Trig functions defined using the parts of the right triangle
Sine, Cosine, Tangent, Cosecant, Secant and Cotangent

4. Sin 60º = Cos 30º
If < 90º

5. Cofunctions of complementary A.
Sin 42º= Cos(90º - 42º) = Cos 48º

6. Trigonometric Identities
Some basic identities

7. Trigonometric Identities
Very important identity
And the identities that you can find

8. Angle of elevation or Angle of depression
the angle it rise from horizontal
Angle of depression:
the angle it drops from horizontal

9. What is the Angle of elevation
Find

10. Find

11. Prove a Trigonometric Identity
Work only on one side

12. Prove a Trigonometric Identity
Work only on one side

13. Prove a Trigonometric Identity
Work only on one side

14. Prove a Trigonometric Identity
Work only on one side

15. Prove a Trigonometric Identity
Work only on one side

16. Prove a Trigonometric Identity
Work only on one side

17. Prove a Trigonometric Identity
Work only on one side

18. Homework
Page
# 3, 9, 15, 18,
21, 25, 31, 36,
40, 46, 48, 51,
55, 57, 61, 66,
71, 74, 82, 86

19. Homework
Page
# 6, 12, 17, 20,
24, 28, 34, 37,
44, 47, 50 54,
56, 60, 65, 68,
72, 75, 84