Question

calculate the side lengths a and b to two decimal points ( i dont understand one bit) picture in comments!!!

Answer 1

law of sines for this one

Answer 2

first find angle C
let me know what you get

Answer 3

? we can do it easy if you get that part

Answer 4

40

Answer 5

\[\frac{a}{\sin(58)}=\frac{8.4}{\sin(40)}\]

Answer 6

i dont get that :(

Answer 7

11.27?

Answer 8

hold on let me check that you are right, then we will go slow

Answer 9

i have no idea so

Answer 10

ok so you got the \(40\) right

Answer 11

now it is the 'law of sines"
the side oppose the angle that is \(40\) has length \(8.4\)

Answer 12

\(a\) is opposite angle with measure \(58\)

Answer 13

that means
\[\frac{8.4}{\sin(40)}=\frac{a}{\sin(58)}\]

Answer 14

so far so good?

Answer 15

yes

Answer 16

that proportion tells you
\[a=\frac{8.4\times \sin(58)}{\sin(40)}\]

Answer 17

is that ok?

Answer 18

yes makes sense

Answer 19

a calculator will give the number you need

Answer 20

ok i haven't used a calculator since 2004
lets use wolfram here

Answer 21

http://www.wolframalpha.com/input/?i=8.4sin%2858%29%2Fsin%2840%29

Answer 22

ok so 11.08

Answer 23

looks right

Answer 24

so its either a or b

Answer 25

right
now do it again

Answer 26

\[\frac{8.4}{\sin(40)}=\frac{b}{\sin(82)}\]

Answer 27

b=8.4 multiplied by sin 82 over sin 40?

Answer 28

bingo

Answer 29

12.94!

Answer 30

http://www.wolframalpha.com/input/?i=8.4sin%2882%29%2Fsin%2840%29

Answer 31

now let me ask a question

Answer 32

yeah

Answer 33

a) do you get how to do this more or less?
b) is it hard?

that was two questions

Answer 34

2 in1... and its hard but understandable thank you

Answer 35

yw
a little more practice and it will be snappy tmwfi