Law of Sines help???
So I have a project and I have to find the measures of angles B and C on all these triangles. They give me measure A and what a and b equal and I know that sinA/a= SinB/b = SinC/c but every time I try and use this it doesn't work out, even when I have an example in my book and I type it into my calculator I get a different answer than the book and I'm just trying to understand what I'm doing wrong. Help would be appreciated!

- cagliero423

- schrodinger

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

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- welshfella

have you got an example?

- cagliero423

Like in the book there is an equation and it says sin 109/RQ=sin39/40
RQ= 40 sin109/sin39
which is about 60.1 cm but when I type it into my calculator I get 33.9

- welshfella

thats equation RQ = is correct

Looking for something else?

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

## More answers

- cagliero423

Yeah I know because it's in my book but I keep getting 33.9 and the answer is 60.1???

- cagliero423

I type it in just as the equation says.

- welshfella

ok calculators vary in the way you enter data
with mine if in enter 40 * sin109 / sin 39 it gives me 60.09

- cagliero423

that is seriously exactly what i type into mine? I don't understand hahah

- welshfella

with some calculators you need to add angle first then sin

- welshfella

try 109 then sine

- cagliero423

Okay hold on

- cagliero423

It says error

- welshfella

ok the sin 109 is the way to go
try sin 109 then hit exe

- cagliero423

I don't see a button that says exe

- welshfella

well whatever button you use to get a result

- cagliero423

Okay I get .8167

- welshfella

or does it give you the answer automatically

- welshfella

well it should be 0.9455

- welshfella

is your calculator set to degrees or radians?

- cagliero423

I have no clue how do I find out???

- welshfella

thats the problem!!!

- welshfella

i just set mine to radians and got 0.816

- welshfella

* 0.8167

- cagliero423

omg, how do I change it to degrees?

- welshfella

what make is ur calculator?

- cagliero423

its a TI-84

- welshfella

oh i don't know about those . Mines a Casio
- maybe you can find a manual on-line.

- cagliero423

Okay, I will do that, you're a life saver I would have never figured that out! haha thank you(:

- welshfella

yw

- cagliero423

Okay could you help me with something really quick actually? I just want to make sure I'm doing this right.
my first equation I have angle A= 62 degrees a= 30 and b=32. So if I'm trying to find angle B I set it up like Sin62/30=SinB/32 right??

- cagliero423

and then it's 32*Sin62/30 ?

- cagliero423

- welshfella

yes

- cagliero423

Okay but then I get .9418 as my answer?

- welshfella

By the way - i used to have a TI a long way back - i remember you changed degrees to radians and vise versa using the MODE key

- cagliero423

Yeah I found a video on how to do it so i fixed that(:

- welshfella

oh ok
hold on

- cagliero423

okie

- welshfella

sin B = 0.9418 yes

- cagliero423

Okay so then is angle B .9418 degrees? I don't get what to do next

- welshfella

no thats the sine of the angle
you need the inverse sine on ur calc - its either marked sin-1 or arcsin

- cagliero423

Ohh okay, thank you again, I think that's all I needed to know(:

- welshfella

yw

Looking for something else?

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