Question

Help me with law of sines.

Answer 1

bet you can do this one on your own

Answer 2

let me know what you get, i will check it
just fill in the answers

Answer 3

Yeah, I am basically doing these so that I can get practice and check my answers with others.
Anyways I tried so far and I got 12/sin52=b/sin45
b=12sin52/sin45
b=11.5

Answer 4

ok i see the problem

Answer 5

did i do it backwards again?

Answer 6

it is a basic algebra issue
how would you solve \[\frac{x}{7}=8\]?

Answer 7

multiply both sides by 7

Answer 8

right
and how would you solve \[\frac{x}{\sin(45)}=8\]?

Answer 9

same concept, multiply both sides by sin(45)

Answer 10

right
so you have to solve \[\frac{b}{\sin(45)}=\text{something}\]what do you do? answer
multiply by \(\sin(45)\) you always multiply by the denomator

Answer 11

this is true

Answer 12

even if that something on the right is a fraction, makes no difference

Answer 13

so then just 12/sin(52)((sin(45))

Answer 14

\[\frac{b}{\sin(45)}=\frac{12}{\sin(52)}\]

Answer 15

yes, but of course multiply means multiply in the numerator, not denominator

Answer 16

so \[b=\frac{12}{\sin(52)}\times \sin(45)=\frac{12\times \sin(45)}{\sin(52)}\]

Answer 17

you got that ?

Answer 18

hold on, I just has to go do a few chores

Answer 19

why would we mulitply the numerator?

Answer 20

what is \[5\times \frac{4}{3}\]?

Answer 21

25/3? yikes I am not the best with fractions

Answer 22

20/3 I mean

Answer 23

yes
what did you do?
answer: you multiplied the numerator by 5

Answer 24

ohh gotcha.

Answer 25

so its 12(sin(42)/sin(52)

Answer 26

yes

Answer 27

b=10.19

Answer 28

you want me to check?

Answer 29

yes please

Answer 30

alrighty

Answer 31

i think i got a slightly different answer hold on

Answer 32

http://www.wolframalpha.com/input/?i=12sin%2845%29%2Fsin%2852%29

Answer 33

i got about \(10.77\)

Answer 34

oh well I may have roudned weird becuase it came out to be 10.18966 so I rounded to 10.19

Answer 35

hmm let me try again

Answer 36

ok

Answer 37

i just use wolfram as you can see above
easier than a calculator

Answer 38

Yep I got that same answer. I forgot to put the numerator and denominator in parenthesis when entering it in to my calculator

Answer 39

ok
now you know how to do this with no agony right?
set up the ratio, multiply by the denominator

Answer 40

Yeah I think I can do the rest on my own, if not Ill try another thread AGAIN lol

Answer 41

Do you actually want to help me with one more, this time its a word problem and I basically just need help with placement. @satellite73