1. Section 4.3

2. Right Triangle Trigonometry

3. Right Triangle Trigonometry
Cofunction Identities

4. Right Triangle Trigonometry
Reciprocal Identities

5. Right Triangle Trigonometry
Quotient Identities

6. Right Triangle Trigonometry
Pythagorean Identities

7. Right Triangle Trigonometry
When using a calculator to do trigonometry, please make sure your calculator is in the correct mode!!!

8. Right Triangle Trigonometry

9. Right Triangle Trigonometry
Angle of elevation is the angle from the horizontal upward to an object
Angle of depression is the angle from the horizontal downward to an object