Mathematics
8 Online
OpenStudy (anonymous):
Basic Trig question. Need help. Diagram in comments.
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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 \(a=14\sin(38^o) \)
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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?
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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.
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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 :)
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OpenStudy (jhannybean):
That's what I got too!
OpenStudy (anonymous):
Okay, Thank you!
OpenStudy (jhannybean):
No problem :)