Alicia's reflection #10

okay so this week wasn't so bad. So far, trig is not as hard as it sounds but I still need to memorize the trig chart.

7-3

sinθ=y/r
cosθ=x/r
tanθ=y/x
cscθ=r/x
secθ=x/y
cotθ=x/y

The equation to use is r=√(x^2+y^2)

***Remember... sin relates to the y axis, cos relates to the x axis, and tan relates to both the x and y axis.

7-4

Memorize this trig chart for the ch. 7 test!!!

0° sin0=0 cos0=1 tan0=0 csc0=undefined sec0=1 cot0=undefined

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

***I have a hard time with the word problems from the homeworks. They really throw me off so if anyone can help with word problems that would really help for the test. Thankss!!



Goodluck on the test :)