REFERENCE ANGLE.pptx

Reference angle in Trigonometry

1. GOOD AFTERNOON EVERYONE 

2. Reference Angle

3. Reference Angle- Let be a non-quadrantal angle in standard position. The reference angle of is the acute angle that the terminal side of makes with the x -axis.   

4. Finding the Reference Angle

5. Finding the Reference Angle

6. Example 1: Find the reference angle for each of the following angles  1. 120 2. 3. -30  

7. Example 2: Use preference angle and appropriate sign to find the exact value of each expression.  1. and 2. 3.  

8. More solved problems: If P ( ) is a point on the unit circle and , what are the coordinates of P ( ) ?  2. If , find if  

9. Thank You