Alicia's Reflection #37

Okay so I've been studying for so long I have decided to stop and go to bed. Hopefully I remember all the formulas for chapters 8 and 10. The notecards that I bought from the math club in the beginning of the year were definitely helpful. Well, here is the trig chart. Tomorrow is the non calculator portion so if you do not know the trig chart you will probably fail :(.....

0°
sin0=0
cos0=1
tan0=undefined
sec0=1
cot0=0

30°
sinπ/6=1/2
cosπ/6=√3/2
tanπ/6=√3/3
cscπ/6=2
secπ/6=2 √3/3
cotπ/6=√3

45°
sinπ/4=√2/2
cosπ/4=√2/2
tanπ/4=1
cscπ/4=√2
secπ/4=√2
cotπ/4=1

60°
sinπ/3=√3/2
cosπ/3=1/2
tanπ/3=√3
cscπ/3=2 √3/3
secπ/3=2
cotπ/3=√3/2

90°
sinπ/2=1
cosπ/2=0
tanπ/2=undefined
cscπ/2=1
secπ/2=undefined
cotπ/2=0

The 6 trig functions are also very helpful to memorize:

sin y/r   csc r/y

cos x/r  sec r/x

tan y/x  cot x/y

Also to move from quadrants:

I-II  make - then add 180

I-III  just add 180

I-IV  make - then add 360

Sin is positive in I and II... Negitive in III and IV

Cos is positive in I and IV... Negative in II and III

Tan is positive in I and III... Negative in II and IV

Goodluck to everyone tomorrow!!!