Finding angles!

- anonymous

Finding angles!

- Stacey Warren - Expert brainly.com

Hey! We 've verified this expert answer for you, click below to unlock the details :)

- schrodinger

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

- anonymous

##### 1 Attachment

- Nnesha

same question like we did before

- hartnn

a and c are given
concentrate on Angle A!
we have opposite side and hypotenuse!
which trigonometric ratio will you use?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- anonymous

Nnesha it was wrong though :) by the way I found out that he doesn't want the degree symbol

- Nnesha

do you mean 28 and 62 was wrong ??

- anonymous

it said undefined when I entered it

- anonymous

hartnn do we set up a proportion only using 90?

- Nnesha

what ?? o.O

- Nnesha

alright i'll check it out let
i'll try t ofind what was wrong .... hmmm

- hartnn

setup a trignometric proportion,
what will be sin A?

- shaik0124

length b is 4

- hartnn

and yes,
if one of the angles in a triangle is 90, only then we can use the definitions of trigonometric ratios

- anonymous

sin A=a/5

- hartnn

a is given to be 3!

- anonymous

sinA=3/5 :)

- hartnn

so you can find the angle A now?

- shaik0124

for length b apply pythagoras theorem

- anonymous

hartnn, if i'm not mistaken wouldn't you need to take the inverse of sin-1(3/5)?

- hartnn

yes thats correct

- anonymous

I got 36.8, but since they want exact measures that would be 37 degrees

- shaik0124

a^2+b^2=c^2
32+b2=52
9+b2=25
b2=25-9
b2=16
b=4

- hartnn

its weird that they need the measure of angles without decimals.
yes, go with 37

- hartnn

they want "EXACT" measures and also not in decimals :P lol

- anonymous

XD I don't know I don't write these problems :D for sin(b), the proportion would equal sin-1(4/5)

- hartnn

one shortcut way to find B is to use the fact that sum of all angles in a triangle is 180 :)

- Nnesha

that's exactly how we solved first question
so 28 was the correct answer

- anonymous

hartnn I wasn't sure if that would be accurate because we rounded lol

- shaik0124

:) 90+A+B=180

- Nnesha

28+62+90 =180 \(\huge\color{green}{\checkmark}\)

- anonymous

but for sin(b) I got 53 degrees

- hartnn

so probably we can expect that 37 here will be given wrong :P

- hartnn

yes, B = 53 if rounded

- anonymous

it mentions that it's wrong :/

##### 1 Attachment

- Nnesha

ouch again!

- shaik0124

HAha enjoy sana

- anonymous

Nnesha yea :/ it's really annoying

- hartnn

try 36.86
if that doesn't work,
try \(\arcsin(3/5)\)
if that doesn't work, not sure what will :P

- shaik0124

atleast the answer i gave length b =4 is correct :)

- Ac3

stop it wants the exact value

- Ac3

decimals will not work

- Ac3

I don't see how it wants you to get the exact angle if it's not even on the unit circle

- hartnn

did
\(\arcsin(3/5) \)
work ?

- Nnesha

whats ur instructor sayz?
did he replid ?

- anonymous

hartnn Will try arcsin 3/5, but I have one last attempt before I get a new problem

- anonymous

Nnesha not yet but it mentioned how it doesn't want the degree symbol

- hartnn

don't go for 36.86
they specifically mentioned no decimals...

- Ac3

if it doesn't want the degree symbol it probably wants it in that form arcsin(3/5)

- anonymous

and for b? arcsin(4/5)?

- Nnesha

right

- Nnesha

B*
b=4

- anonymous

guyssss it's correct :D thank you a lot all of you

- anonymous

they just wanted the arcsin

- hartnn

yaaaaay! :D

- Ac3

sometimes it's just a matter of following the directions

- anonymous

Ac3 sometimes the directions aren't so clear :D

- Ac3

Well it was in bold.

- Ac3

lol

- anonymous

Ac3 XD anyways

- Ac3

lol if you need any help i'll be online for a bit.

- hartnn

move on to next problem!

- anonymous

hartnn will do :) thanks again

Looking for something else?

Not the answer you are looking for? Search for more explanations.