anonymous
  • anonymous
Finding angles!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Nnesha
  • Nnesha
same question like we did before
hartnn
  • hartnn
a and c are given concentrate on Angle A! we have opposite side and hypotenuse! which trigonometric ratio will you use?

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More answers

anonymous
  • anonymous
Nnesha it was wrong though :) by the way I found out that he doesn't want the degree symbol
Nnesha
  • Nnesha
do you mean 28 and 62 was wrong ??
anonymous
  • anonymous
it said undefined when I entered it
anonymous
  • anonymous
hartnn do we set up a proportion only using 90?
Nnesha
  • Nnesha
what ?? o.O
Nnesha
  • Nnesha
alright i'll check it out let i'll try t ofind what was wrong .... hmmm
hartnn
  • hartnn
setup a trignometric proportion, what will be sin A?
shaik0124
  • shaik0124
length b is 4
hartnn
  • hartnn
and yes, if one of the angles in a triangle is 90, only then we can use the definitions of trigonometric ratios
anonymous
  • anonymous
sin A=a/5
hartnn
  • hartnn
a is given to be 3!
anonymous
  • anonymous
sinA=3/5 :)
hartnn
  • hartnn
so you can find the angle A now?
shaik0124
  • shaik0124
for length b apply pythagoras theorem
anonymous
  • anonymous
hartnn, if i'm not mistaken wouldn't you need to take the inverse of sin-1(3/5)?
hartnn
  • hartnn
yes thats correct
anonymous
  • anonymous
I got 36.8, but since they want exact measures that would be 37 degrees
shaik0124
  • shaik0124
a^2+b^2=c^2 32+b2=52 9+b2=25 b2=25-9 b2=16 b=4
hartnn
  • hartnn
its weird that they need the measure of angles without decimals. yes, go with 37
hartnn
  • hartnn
they want "EXACT" measures and also not in decimals :P lol
anonymous
  • 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
  • hartnn
one shortcut way to find B is to use the fact that sum of all angles in a triangle is 180 :)
Nnesha
  • Nnesha
that's exactly how we solved first question so 28 was the correct answer
anonymous
  • anonymous
hartnn I wasn't sure if that would be accurate because we rounded lol
shaik0124
  • shaik0124
:) 90+A+B=180
Nnesha
  • Nnesha
28+62+90 =180 \(\huge\color{green}{\checkmark}\)
anonymous
  • anonymous
but for sin(b) I got 53 degrees
hartnn
  • hartnn
so probably we can expect that 37 here will be given wrong :P
hartnn
  • hartnn
yes, B = 53 if rounded
anonymous
  • anonymous
it mentions that it's wrong :/
Nnesha
  • Nnesha
ouch again!
shaik0124
  • shaik0124
HAha enjoy sana
anonymous
  • anonymous
Nnesha yea :/ it's really annoying
hartnn
  • hartnn
try 36.86 if that doesn't work, try \(\arcsin(3/5)\) if that doesn't work, not sure what will :P
shaik0124
  • shaik0124
atleast the answer i gave length b =4 is correct :)
Ac3
  • Ac3
stop it wants the exact value
Ac3
  • Ac3
decimals will not work
Ac3
  • Ac3
I don't see how it wants you to get the exact angle if it's not even on the unit circle
hartnn
  • hartnn
did \(\arcsin(3/5) \) work ?
Nnesha
  • Nnesha
whats ur instructor sayz? did he replid ?
anonymous
  • anonymous
hartnn Will try arcsin 3/5, but I have one last attempt before I get a new problem
anonymous
  • anonymous
Nnesha not yet but it mentioned how it doesn't want the degree symbol
hartnn
  • hartnn
don't go for 36.86 they specifically mentioned no decimals...
Ac3
  • Ac3
if it doesn't want the degree symbol it probably wants it in that form arcsin(3/5)
anonymous
  • anonymous
and for b? arcsin(4/5)?
Nnesha
  • Nnesha
right
Nnesha
  • Nnesha
B* b=4
anonymous
  • anonymous
guyssss it's correct :D thank you a lot all of you
anonymous
  • anonymous
they just wanted the arcsin
hartnn
  • hartnn
yaaaaay! :D
Ac3
  • Ac3
sometimes it's just a matter of following the directions
anonymous
  • anonymous
Ac3 sometimes the directions aren't so clear :D
Ac3
  • Ac3
Well it was in bold.
Ac3
  • Ac3
lol
anonymous
  • anonymous
Ac3 XD anyways
Ac3
  • Ac3
lol if you need any help i'll be online for a bit.
hartnn
  • hartnn
move on to next problem!
anonymous
  • anonymous
hartnn will do :) thanks again

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