Question

help

Answer 1

@Vocaloid

Answer 2

this is the law of cosines, use this to find the angle C, given the sides a, b, c

Answer 3

d

Answer 4

good

Answer 5

@Vocaloid

Answer 6

3 is pretty much the same, just draw the two satellites, the observer, the side lengths, and find the internal angle

Answer 7

b

Answer 8

?

Answer 9

I got something a little different, check your calculations again

Answer 10

d

Answer 11

424^2 = 658^2 + 471^2 - 2(471)(658)cos(x)

Answer 12

50

Answer 13

subtract 658^2 and 471^2 from both sides

divide both sides by (-2)(471)(658)

then take the arccos of the result.

Answer 14

4 is b

Answer 15

we have a different method to find it

Answer 16

the work looks good, I don't see any mistakes so that should be it

Answer 17

good

Answer 18

2 is good

for triangle 3 I think you would just draw the three sides, use law of cosines to find one of the missing angles, then law of sines to find one of the other hands, then find the third angle

Answer 19

is 40 one of the answers

Answer 20

yeah, then write 40 degrees as your angle C and find one of the other angle with law of sines

Answer 21

74

Answer 22

snd 66?

Answer 23

hm, I got something a little different

if we plug in the 40 deg angle from earlier

82/sin(40) = 35/sin(x) find angle x

Answer 24

16

Answer 25

hm. that's what I got but I just checked it and it wouldn't work since 180 - 16 - 40 = 124 which isn't one of the other choices :S

Answer 26

but how would I find the 3rd angle

Answer 27

that's what I'm saying

Answer 28

let me redo my calculations

Answer 29

that's why I said 66 and 74

Answer 30

yeah let's go with that, those are the only choices that work with 40 degrees

Answer 31

4 is just another law of cosines question

x^2 = 70^2 + 52^2 + 2(70)(52)cos(120) then find x

Answer 32

oh whoops

Answer 33

x^2 = 70^2 + 52^2 - 2(70)(52)cos(120) sorry

Answer 34

it would be add anyways keep change opposite rule lol c 106

Answer 35

yeah that's it

Answer 36

3 was the other 3 options lol

Answer 37

we tried

Answer 38

@Vocaloid

Answer 39

actually hold on

Answer 40

lol ok

Answer 41

so yeah, you would re-write sin^2 as 1 - cos^2, then I you would multiply both sides by -1, what would you get?

Answer 42

a?

Answer 43

good

Answer 44

I am not sure how to approach #2

Answer 45

c?

Answer 46

i don't know either lol

Answer 47

@Shadow

Answer 48

for #3 I would honestly just set f(x) = 6 and then use an online graphing tool to find the first two values of t above 0

Answer 49

b?

Answer 50

I got something a little different, the first time the height is 6 is 2.2 hours and the second time is at 9.8 so 7.6

Answer 51

i just got d too

Answer 52

now 2 do we just guess

Answer 53

well normally I'd try and find someone else who can help but they're all busy rn ;_; if you feel comfortable guessing then I suppose so :S

Answer 54

there's a discord server for homework help, I could try there :S