Question

Solve using law of cosines or law of sines
A=50* B=30* c=9*
a= b= C=

Answer 1

@myininaya when you have time

Answer 2

You are given ASA
that means you are given a side between 2 angles
law of sines

Answer 3

http://home.windstream.net/okrebs/page94.html
here is cool site
to see which goes with which

Answer 4

Okay i tried to figure it out but I cant

Answer 5

find that 3rd angle first

Answer 6

I was start with finding the 3rd angle if given the first 2

Answer 7

once you find the 3rd angle use the law of sines

Answer 8

so c^2 =b^2-a^2?

Answer 9

180=A+B+C

Answer 10

im sorry +

Answer 11

Wait, huh ?

Answer 12

Do you know the sum of the angles in a triangle is 180 degrees?

Answer 13

yes

Answer 14

180=50+30+C?

Answer 15

So you know A+B+C=180
right

Answer 16

80=c?

Answer 17

100 ****

Answer 18

100 is C
not c

Answer 19

C=100

Answer 20

Right so now you have all 3 angles
and you also have side c

Answer 21

so now you can go into using law of sines

Answer 22

you can do either
\[\frac{\sin(A)}{a}=\frac{\sin(C)}{c} \text{ or } \frac{\sin(B)}{b}=\frac{\sin(C)}{c}\]

Answer 23

actually go ahead and do both side we need both a and b

Answer 24

Can i just type it in my calculator?

Answer 25

Crap nevermind we dont have a or b

Answer 26

first solve the first one for a
and solve the second one for b
then you can use the calculator

Answer 27

\[\frac{ \sin 50 }{ a }=\frac{ \sin 100 }{ 9 }\]
?

Answer 28

@myininaya

Answer 29

yes now cross multiply

Answer 30

9sin50=asin100

Answer 31

ok and the divide by sin(100)

Answer 32

you are ready to put into your calculator now

Answer 33

7.0007?

Answer 34

yah

Answer 35

Okay what next :)

Answer 36

find b

Answer 37

\[\frac{\sin(B)}{b}=\frac{\sin(C)}{c} \]

Answer 38

4.57=b

Answer 39

sounds great

Answer 40

that's it

Answer 41

good job

Answer 42

Thank you.

Answer 43

np