Question

Can someone help me?

Answer 1

What do you need help with?

Answer 2

Use a calculator to find the given value. Round to four decimal places.

sin 20 degree.

0.3584
2.7904
0.9336
0.3839

Answer 3

21 degree*

Answer 4

Do you not have a calculator? If you don't you can enter the problem into the box at http://www.wolframalpha.com/

Answer 5

thanks :)

Answer 6

can you help me with something else?

Answer 7

sure

Answer 8

Find the value of a in the diagram of the right triangle. Round to the nearest tenth.

21.6 in.
24.2 in.
5.0 in.
12.3 in

Answer 9

In this case, you know the opposite is 11 in, the hypotenuse is a, and the angle is 27 degrees
We also know that
\[\sin A = \left( opposite \over hypotenuse \right)\]so\[\sin (27)=\left( 11 \over a \right)\]Rearrange to solve for a

Answer 10

so what would the answer be?

Answer 11

\[a=\left( 11 \over \sin( 27) \right)\]You can use the same website I gave you above to calculate your answer.

Answer 12

how would I write that into alpha?

Answer 13

11/sin27

Answer 14

what answer did you get?

Answer 15

249.7?

Answer 16

when I put 11/sin27 into the box on the website I gave you, the answer was 22.2295819....

Answer 17

so outta these

21.6 in.
24.2 in.
5.0 in.
12.3 in

which one would it be?

Answer 18

never mind I got it :)

Answer 19

I need more help , hold on.

Answer 20

A ladder leans against a building forming an angle of 55 degree. with the ground as shown in the diagram. The base of the ladder is 5 feet from the building. What is the length of the ladder?

9.1 feet
6.1 feet
7.1 feet
8.7 feet

Answer 21

I'll look at this new one but I just wanted to point out that I copied the answer incorrectly, I had gotten 24.2295819......typo.

Answer 22

it's okay :)

Answer 23

Okay, this new problem is exactly the same situation except in this case we are dealing with the adjacent over the hypotenuse, which is related by the cosine so\[\cos A =\left( adjacent \over hypotenuse \right)\]The adjacent is 5 ft and use x for the hypotenuse and 55 degrees for the angle, our equation becomes
\[\cos(55)=\left( 5 \over x \right)\]

Answer 24

Okay, how would I type this on alpa?

Answer 25

if you rearrange again as I did above\[x=\left( 5 \over \cos 55 \right)=5/\cos55\]

Answer 26

Okay thank you :)

A large totem pole near Kalama, Washington, is 106 feet tall. At a particular time of day, the angle of elevation to the top of the pole from the end of the shadow it casts is 23 degree. What is the length of the shadow? Round to the nearest tenth.

115.2 ft
45.0 ft
271.3 ft
249.7 ft

Answer 27

WRONG Attachment , heres the one.

Answer 28

Ok this is not what OS is for
As per the code of conduct you are to \(guide\) askers to the solution only
@Missyxo we've talked about this
@pfenn1 please make her answer the question herself, do not directly provide the answers

Answer 29

@TuringTest I already have help.

Answer 30

I ma here to make sure that help is up to the standards of this site :)

Answer 31

ok.

Answer 32

so far it has not been, though pfenn seems to be trying, which is cool
but we need \(you\) to answer the questions based on hints given by our tutors

Answer 33

Okay @TurningTest. This is yet another very similar problem but this time we are given the opposite (106) and are asked for the adjacent. The drawing is in case you aren't familiar with the definitions of adjacent et al.