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Mathematics 8 Online
OpenStudy (anonymous):

Basic Trig question. Need help. Diagram in comments.

OpenStudy (anonymous):

OpenStudy (jhannybean):

just look at this part of the triangle : |dw:1419067014958:dw|

OpenStudy (anonymous):

Is the answer 11.98387? I think I might have got it.

OpenStudy (jhannybean):

Using special right triangles, You can use the identity \[\sin(\theta) = \frac{\text{opp}}{\text{hyp}}\]. You have \[\sin(38^o) = \frac{a}{14}\]

OpenStudy (jhannybean):

So \(a=14\sin(38^o) \)

OpenStudy (jhannybean):

What do you get when you solve that?

OpenStudy (jhannybean):

@maullom1 ?

OpenStudy (anonymous):

One sec, sorry

OpenStudy (anonymous):

128.70244845902322840215534302139? I might be completely wrong. I'm pretty lost.

OpenStudy (jhannybean):

Ok, are you using a scientific calculator?

OpenStudy (anonymous):

No. I don't have one

OpenStudy (jhannybean):

in this, first make sure to look on the upper left hand side to see if it is in radians or degrees,

OpenStudy (jhannybean):

So first make sure your calculator is in degrees by looking up in the upper left hand corner.

OpenStudy (jhannybean):

Want it to look like this. http://prntscr.com/5ivsfa

OpenStudy (jhannybean):

`Deg` is exposed, meaning the calculator is in degrees right now

OpenStudy (jhannybean):

now type in `14sin38`

OpenStudy (jhannybean):

You should get your answer.

OpenStudy (anonymous):

8.61926065456?

OpenStudy (jhannybean):

There you go :)

OpenStudy (jhannybean):

That's what I got too!

OpenStudy (anonymous):

Okay, Thank you!

OpenStudy (jhannybean):

No problem :)

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