Question

Find the exact values of the sine and cosine of 315˚ and -315˚. Then find the decimal equivalents. Round your answers to the nearest hundredth.

Answer 1

you got a nice unit circle cheat sheet?

Answer 2

now you do
find \(315^\circ\) on the last page of the attached cheat sheet
then look at the corresponding coordinates on the unit circle
the first coordinate is cosine, the second is sine

Answer 3

lol thanks

Answer 4

\[y=\sin ^{-1}y\] \[x=\sin(y)\]

Answer 5

you lost me there
aren't you trying to find \(\sin(315^\circ)\)?

Answer 6

i guess. i honestly have no idea what its asking me

Answer 7

that is what is says right?

Answer 8

yes

Answer 9

"Find the exact values of the sine and cosine of 315˚"

Answer 10

i don't get the page you posted

Answer 11

are you on the last page with the circle?

Answer 12

thats the 2nd to last page

Answer 13

actually it is page 3, second to last
right

Answer 14

you see 315 labelled on the circle?

Answer 15

yes
now you see that ordered pair there right, looks like \[(\frac{\sqrt2}{2},-\frac{\sqrt2}{2})\]

Answer 16

yes

Answer 17

the first coordinate is \(\cos(315^\circ)\) and the second is \(\sin(315^\circ)\)

Answer 18

so \[\cos(315^\circ)=\frac{\sqrt2}{2}\]

Answer 19

oh ok

Answer 20

easy enuf right?

Answer 21

yes thank you

Answer 22

yw

Answer 23

let me know when you need help with \(-315^\circ\)

Answer 24

to the nearest hundredth means to 2 decimal places