Question

Finding angles!

Answer 1

same question like we did before

Answer 2

a and c are given

concentrate on Angle A!

we have opposite side and hypotenuse!

which trigonometric ratio will you use?

Answer 3

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

Answer 4

do you mean 28 and 62 was wrong ??

Answer 5

it said undefined when I entered it

Answer 6

hartnn do we set up a proportion only using 90?

Answer 7

what ?? o.O

Answer 8

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

Answer 9

setup a trignometric proportion,

what will be sin A?

Answer 10

length b is 4

Answer 11

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

Answer 12

sin A=a/5

Answer 13

a is given to be 3!

Answer 14

sinA=3/5 :)

Answer 15

so you can find the angle A now?

Answer 16

for length b apply pythagoras theorem

Answer 17

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

Answer 18

yes thats correct

Answer 19

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

Answer 20

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

Answer 21

its weird that they need the measure of angles without decimals.

yes, go with 37

Answer 22

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

Answer 23

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

Answer 24

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

Answer 25

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

Answer 26

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

Answer 27

:) 90+A+B=180

Answer 28

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

Answer 29

but for sin(b) I got 53 degrees

Answer 30

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

Answer 31

yes, B = 53 if rounded

Answer 32

it mentions that it's wrong :/

Answer 33

ouch again!

Answer 34

HAha enjoy sana

Answer 35

Nnesha yea :/ it's really annoying

Answer 36

try 36.86

if that doesn't work,
try \(\arcsin(3/5)\)

if that doesn't work, not sure what will :P

Answer 37

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

Answer 38

stop it wants the exact value

Answer 39

decimals will not work

Answer 40

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

Answer 41

did

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

Answer 42

whats ur instructor sayz?
did he replid ?

Answer 43

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

Answer 44

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

Answer 45

don't go for 36.86

they specifically mentioned no decimals...

Answer 46

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

Answer 47

and for b? arcsin(4/5)?

Answer 48

right

Answer 49

B*
b=4

Answer 50

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

Answer 51

they just wanted the arcsin

Answer 52

yaaaaay! :D

Answer 53

sometimes it's just a matter of following the directions

Answer 54

Ac3 sometimes the directions aren't so clear :D

Answer 55

Well it was in bold.

Answer 56

lol

Answer 57

Ac3 XD anyways

Answer 58

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

Answer 59

move on to next problem!

Answer 60

hartnn will do :) thanks again