Question

Find the exact value of the hypotenuse of the triangle.
Use the triangle below to answer this question.

Answer 1

cos 30 = 9/x

Answer 2

Use Cos function

Answer 3

@CynthiaJune94 I think you're too much confused in Trigonometry

Answer 4

I am!! I dont know how to do it.... :(
and would that be 270?

Answer 5

no it wouldn't

Answer 6

then how would you solve that? wouldnt you multiply the nine on both sides to get the x by itself?

Answer 7

if you multiplied 9 on both sides you would get:

9 cos 30 = 81/x

Answer 8

okay then how do you do it right?
would 7.794 be the correct answer?

Answer 9

how did you get 7.794?

Answer 10

cos 30=.866
then i multiplied that by 9
oh maybe i should have divided....

Answer 11

where did you get .866?

Answer 12

i did the cos button on my graphing calculator and multplied that by 30

Answer 13

you don't multiply cos by 30, cos is an operation. you're "cosing" 30.

cos 30 is one term.

Answer 14

yea it looked like this on my calculator...
cos(30)=.866

Answer 15

rearrange and solve for x

Answer 16

.866 = 9/x

Answer 17

learn how to do it without a graphing calculator, you won't be able to use it on a test.

Answer 18

x=7.794
Right?

Answer 19

no

Answer 20

sigh....
i dont know....

Answer 21

im just not getting it...

Answer 22

3 = 9/x

whats x?

Answer 23

x=27
where did you get 3 tho?

Answer 24

i'm giving you an easier example.

Answer 25

so you think 9 / 27 = 3?

Answer 26

no....

Answer 27

9/x=.866?

Answer 28

yes, so what's x?

Answer 29

you learned this in 7th grade.

if 3 = 9/x

what do you do to solve for x?

Answer 30

so x would be 10.345

Answer 31

you multiply both sides by x and then divide both sides by 3 to make x the subject of your equations. with that you get 3

Answer 32

x=10.3926

Answer 33

right?

Answer 34

how did you get that? yes

Answer 35

he said multiply both sides by x making it .866x=9 then i divided 9 by .866
x=10.3926
Omg!!! Thank you so much but i have one more like this i need help with

Answer 36

cynthia, i hope you've understood the concept

Answer 37

see my next question and see if i did it right?
PLZ