Question

Help

Answer 1

B

Answer 2

yeah good

Answer 3

B

Answer 4

not quite, reflection across y would be cos(-x) not -cos(x)

Answer 5

A

Answer 6

Ugh I'm confused

Answer 7

just compare 3cos(x) and cos(x)

what does multiplying 3 by the entire function do to cos(x)?

Answer 8

C

Answer 9

good, a vertical stretch by 3 so C is the only possibility

Answer 10

any ideas/thoughts so far? it's good to get a mental image of what these graphs look like so you can at least eliminate a few possibilities

Answer 11

like, only cot(x) and tan(x) have that swoopy line pattern [very scientific i know] so between cot(x) and -tan(x) which one matches the graph?

Answer 12

cot

Answer 13

good, so A

Answer 14

C

Answer 15

that's a good guess but not quite, the 3 is multiplied so its stretching the cos not shifting it

as a hint pay attention to what pi is doing, is it shifting it up or down?

Answer 16

you can re-write the function as -3cos(x-2) + pi if that makes it easier

Answer 17

welp the site's back on

Answer 18

Down?

Answer 19

yeah the site went down for like a minute

anyway, made any progress on this q yet?

Answer 20

No I meant down,, as for the answer =) ;p

Answer 21

oh

since we're adding pi the shift would be up not down so A

Answer 22

1

Answer 23

well done

Answer 24

What is a period for the secant function? (Answer in radians)

Answer 25

hint - period of sec is the same as the period of cos which is...?

Answer 26

2pi

Answer 27

awesome so 2pi = your ans

Answer 28

B

Answer 29

good

Answer 30

period

Answer 31

good

Answer 32

B

Answer 33

awesome

Answer 34

D

Answer 35

yup well done

Answer 36

B

Answer 37

yup well done