Question

Precaluclus need help will give owl bucks most needed help for test tommorow

Answer 1

A=70 , a=7 , b=4 ; B=?

Answer 2

For each traingle, determine the indicated value

Answer 3

here apply the sine rule.....It says
\[\frac{ a }{ \sin A } = \frac{ b }{ \sin B }\]

Answer 4

According to sine rule
\[\frac{ a }{ \sin A } =\frac{ b }{ \sin B } = \frac{ c }{ \sin C }\]

Answer 5

Hello sorry had to get something

Answer 6

How do u know which one is which rules , is there a easier way to know like the letter itself or only the phrases state that its possible

Answer 7

The sine rule is used when we are given either a) two angles and one side, or b) two sides and a non-included angle....
and u see if u even try to apply cosine rule .....u dont have the value of 'c'....so in the cosine rule u will be having two variables

Answer 8

O sorry i wrote it wrong

Answer 9

Im trying to find the pcitrue

Answer 10

They included an angle so would it still be the sine rule

Answer 11

yup....... :)

Answer 12

Ok so now i shall find the sine rule

Answer 13

nvm u wrote it

Answer 14

yup use the equation
\[\frac{ a }{ \sin A } = \frac{ b }{ \sin B }\]
or u can say
\[\frac{ \sin A }{ a } = \frac{ \sin B }{ b }\]
u got the value of a,b,A
get the value of sinA using calculator

Answer 15

yup

Answer 16

9.04520517796

Answer 17

whts tht???

Answer 18

7/sin70

Answer 19

ooo yeahh

Answer 20

so what nowlol

Answer 21

see on plugging the value of sinA
\[\frac{ 7 }{ 0.9396926208 } = \frac{ 4 }{ \sin B }\]
then
u can write it as
\[\frac{ 0.9396926208 }{ 7 } = \frac{ \sin B }{ 4 }\]
so
sin B/4 = 0.134241

Answer 22

so sin B = 0.536972
and B = \[\sin^{-1} (0.134241)\]
use calculator to get B

Answer 23

what but i dived 7 over sinA already but sina still exists? just to confirm

Answer 24

plug the value of sin A
sin A = 0.9396926208

Answer 25

like 7/sin A = 7/0.9396926208 = 7.45

Answer 26

so 7.45 = 4/sinB

Answer 27

for sin70 i got 0.77389068155

Answer 28

nah nah
sin 70 = 0.93969

Answer 29

Ok google was lieing to me i jsut saw the actual answer

Answer 30

So why do i do sin-1?

Answer 31

\[B = \sin^{-1} (0.5369)\]

Answer 32

So in a caluclator i would put X instead of B?

Answer 33

if u r using calculator on computer..then type 0.5369 and click on sin-1

Answer 34

\[7=\sin b/4\]

Answer 35

hmmmm wht?????/
it supposed to be
\[\frac{ \sin 70 }{ 7 } = \frac{ \sin B }{ 4 }\]