Alaina's reflection

This week, we started Trig. Lovely. For the most part, I understand it. I think that I might have trouble remembering all of the formulas, but that is just me needing to study. A lot.

Section 7.1

1. angles are measured in degrees (minutes or seconds) or radians
2. to find minutes, you multiply what is behind the origional decimal by 60
3. to find seconds, you multiply the "minutes decimal" by 60 and then divide by 3600

to change from degrees to radians, multiply degrees x pi/180

to change from radians to degrees, multiply radians x 180/pi

*NEVER PLUG PI INTO CALCULATOR & ALWAYS USE EXACT ANSWERS.

Example:

15.3°rees;

15°rees; (.3 x 60)

15°rees; 18'

90°rees; convert to radians

90 x pi/180

90/180 pi

1/2 pi=pi/2