kittiwitti1
  • kittiwitti1
What am I doing wrong? Please help! Steps I took in comments below http://prntscr.com/9at98m
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
kittiwitti1
  • kittiwitti1
\[9\sin{\theta}-5\rightarrow 9\sin{\theta}=5\rightarrow\sin{\theta}=\frac{5}{9}?\]
mathmale
  • mathmale
Much better: one question posted at a time, and you have shared the work you've already done. sin theta = 5/9 is solveable for theta. First, y ou might want to graph the function sin theta between -2pi and 2pi to get an idea (rough idea) of the angles "theta" at which the sine has the value +5/9. What type of calculator are you using? Have you set the calculator to DEGREE mode?
kittiwitti1
  • kittiwitti1
I don't know how to use "degree mode" on WolframAlpha. My graphing calculator broke.

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mathmale
  • mathmale
About your first comment: You or I could boot your question to the top of the queue if you don't get responses fast. Secondly, if you leave your problem posted and open, someone is likely to answer it when the number of users increases. That's dependent upon the day and the time, as I explained earlier.
mathmale
  • mathmale
We know that \[\sin \frac{ 5 }{ 9 } =\theta\]
mathmale
  • mathmale
is the answer, but it's in implicit form. We have to solve this equation for theta. How would you do that if your calculator were not broken?
kittiwitti1
  • kittiwitti1
I am not getting feasible results for \[\arcsin{\frac{5}{9}}\]
mathmale
  • mathmale
I've set my TI-83Plus calculator to degree mode and am typing in the following:\[\sin ^{-1}\frac{ 5 }{ 9 }\]
mathmale
  • mathmale
result: 33.749 degrees. Now all you have to do is to convert 0.749 degrees to minutes and seconds. Can you do that?
kittiwitti1
  • kittiwitti1
Degrees and seconds are not accepted
kittiwitti1
  • kittiwitti1
Oh, one decimal place... .7 or .8?
kittiwitti1
  • kittiwitti1
http://prntscr.com/9atev6
mathmale
  • mathmale
What do you think? Round off 33.7489886 to 1 decimal place.
kittiwitti1
  • kittiwitti1
33.8
mathmale
  • mathmale
I typed into Wolfram the following: arcsin 5/9, and quickly got a value for theta in radians. You'd have to convert that into degrees and then round off.
kittiwitti1
  • kittiwitti1
Okay
mathmale
  • mathmale
I disagree with that 33.8 degrees answer. Take another look at your round-off work.
mathmale
  • mathmale
Practice: round off 33.312 degrees to 1 dec. place. round off 33. 89 to 1 dec. place.
kittiwitti1
  • kittiwitti1
I asked this question previously on another site and was told it was 33.8... I guess that person was not a qualified math expert then. 33.7?
mathmale
  • mathmale
Yes. The rule is: 33.749... is rounded down to 33.7, whereas 33.750 or greater is rounded up to 33.8.
kittiwitti1
  • kittiwitti1
I thought so too, but that person insisted it was 33.8 No idea why.
mathmale
  • mathmale
always good to double check if y ou disagree with a helper. But do it politely and privately.
mathmale
  • mathmale
Care to move on to another problem?
kittiwitti1
  • kittiwitti1
Okay, if I can wrangle this lag >_>;
kittiwitti1
  • kittiwitti1
Also, what's with the other answer, theon?
mathmale
  • mathmale
"wrangle this lag" ... Never heard that particular phrase before. Still mad about the long waits?
kittiwitti1
  • kittiwitti1
Well, no; the entire site is laggy.
kittiwitti1
  • kittiwitti1
http://prntscr.com/9athhh
mathmale
  • mathmale
sin theta =5/9 has TWO solutions between 0 and 180 degrees. Know how to find the 2nd solution? I quit OpenStudy for a year partly because I was fed up with the mechanical delays. But I still think my advice is good: Learn when a couple of dozen users are on, and then ask for help during such time periods.
kittiwitti1
  • kittiwitti1
AUGH THIS LAG! Um, +360?
mathmale
  • mathmale
Re: "what's wioth the 2nd answer?" I was asking you how you'd find it. As before, there are 2 solutions between 0 and 180?
kittiwitti1
  • kittiwitti1
mistyped
kittiwitti1
  • kittiwitti1
I really hate this lag.
mathmale
  • mathmale
|dw:1449362852825:dw|
kittiwitti1
  • kittiwitti1
It says o < theta < 360
kittiwitti1
  • kittiwitti1
well < or = but yeah
mathmale
  • mathmale
Enuf. I can't do anything about the delays; Have to live with it. OpenStudy is free. Where else would you get free math help? Patience, please. If you'd look at the graph of the sine function, you'd see that sin theta =5/9 is possible ONLY in Quadrants I and II.
mathmale
  • mathmale
Hint: simply subtract 33.749 from 180 degrees and then round off the answer to 1 decimal place.
mathmale
  • mathmale
The resulting angle will be in QII.
kittiwitti1
  • kittiwitti1
I'm not complaining about the lags but it is the reason why I keep messing up/not typing thisngs in right
kittiwitti1
  • kittiwitti1
well, that and I can't see half your replise because of this lag
mathmale
  • mathmale
sin theta = 5/9 has no solutions in QIII or IV No, OpenStudy is NOT the reason for that. Please, let's focus on math if y ou still want math help.
mathmale
  • mathmale
So, your two solutions, to 1 dec. place each, are 33.7 degrees and ... ???
kittiwitti1
  • kittiwitti1
I mean I mistype things because I type fast and this site lags. It's happened before. Example: "replies" was mystped as "replise"
mathmale
  • mathmale
so what? i can interpret replise ans "replies." One mroe question? No more complaints, please.
kittiwitti1
  • kittiwitti1
How is this a complaint? OS has had lag problems for ages... 180-33.7=146.3 It literally took me eight minutes to type up a response. How is that not lag?
kittiwitti1
  • kittiwitti1
Is the result wrong because of the 33.8, then?
mathmale
  • mathmale
I have to deal with it also. Enuf, please. One more chance: want to discuss another problem (without mention of "lag") or not?
mathmale
  • mathmale
Yes, if your 2nd answer was "wrong," that was because of the incorrect rounding.
kittiwitti1
  • kittiwitti1
And that tutor on the other website insisted it was 33.8 ...
kittiwitti1
  • kittiwitti1
I guess I should not believe them so readily
jim_thompson5910
  • jim_thompson5910
I'm getting 33.7 and 146.3 as well. If the second answer doesn't work, then there may be a typo somewhere? Anyways, there is one neat way to compute trig inverses using google. Google can be used as a calculator. Type in "arcsin(5/9) in degrees" without quotes. You have to stick "in degrees" in there because google defaults in radian mode for some reason See the attached image
1 Attachment
kittiwitti1
  • kittiwitti1
I did ask but they insisted it was 33.8, no idea why. It worked, but thank you for that @jim_thompson5910
mathmale
  • mathmale
kitti: the world is not always exactly as we want it to be. I am sorry, but that's life. I wanted you to post or ask another question, not another complaint. I'm going to take a break from this. Glad to help you again when you can stifle complaints. Our math discussion was good, and I appreciate that. Bye for now.
kittiwitti1
  • kittiwitti1
http://prntscr.com/9atnn7 I was only explaining why I can't respond as quickly, because I've been subject to anger just for lagging. But if that's interpreted as complaining, then I don't know which one would please tutors more! -_-
kittiwitti1
  • kittiwitti1
And yes, that link is another question
mathmale
  • mathmale
As I said, I'm off for a while. Frankly tired of complaints.
kittiwitti1
  • kittiwitti1
It's not a complaint. I need to explain to people because apparently nobody else lags enough to understand that I'm trying to get help without wasting other people's time. "Why are you taking so long to respond? Are you needing help or not?" "Don't be ungrateful ... you took too long to answer." These are literal things I've heard from tutors. Am I supposed to just ignore that and not get help because they don't get I'm lagging...? I'm just trying to understand my own work, and not annoy people because I lag. If explaining that is complaining then idk how to get people to help me without them getting mad.
kittiwitti1
  • kittiwitti1
Plus, you said you wanted another question, so I posted that link. *shrugs*

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