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 Posted: Sat Sep 01, 2012 6:13 pm
This may sound terrible, but I'm taking pre-calc online to make room for my AP classes and my teacher isn't helping at all... I ask her to help with a topic and she tells me to e-mail her questions and not call her, and when I e-mail her questions she tells me to listen to the lesson recordings which don't help.
I don't want someone to give me the answers, but more so.. do similar problems and show me how it's done. :c Tutoring is only tues-thurs and they aren't so nice either haha.
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Posted: Sat Sep 01, 2012 6:22 pm
ooh, that sucks. so...what's going on? i'll try~
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Posted: Sat Sep 01, 2012 6:25 pm
What's the question you're having trouble with?
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Posted: Sat Sep 01, 2012 6:33 pm
Malacina What's the question you're having trouble with? It's most of the course in general(I did two/eight modules and averaged a high B, and the third that I'm on has brought me to a medium C). We have an online textbook and it mainly just gives definitions, so they record lessons to help. But the lessons don't have all of the types of problems we're assessed on.
Convert the angle 61°38'45" to decimal degrees and round to the nearest hundredth of a degree.
Convert 17.47° to degrees, minutes, and seconds. Those are two problems from the homework and they weren't covered at all in the lesson on how to do them. The lesson mainly went over the unit circle and how to read it.
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Posted: Sat Sep 01, 2012 6:34 pm
Kitalpha Hart ooh, that sucks. so...what's going on? i'll try~ Read my previous*response! :3
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Posted: Sat Sep 01, 2012 6:40 pm
Immoral Oblivion Kitalpha Hart ooh, that sucks. so...what's going on? i'll try~ Read my precious response! :3 found something that's a download that looks like it's for this kind of stuff... sorry about being so...unhelpful
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Posted: Sat Sep 01, 2012 6:41 pm
Kitalpha Hart Immoral Oblivion Kitalpha Hart ooh, that sucks. so...what's going on? i'll try~ Read my precious response! :3 found something that's a download that looks like it's for this kind of stuff... sorry about being so...unhelpful Thank you! any help is greatly appreciated. :3
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Posted: Sat Sep 01, 2012 6:48 pm
Immoral Oblivion Kitalpha Hart Immoral Oblivion Kitalpha Hart ooh, that sucks. so...what's going on? i'll try~ Read my precious response! :3 found something that's a download that looks like it's for this kind of stuff... sorry about being so...unhelpful Thank you! any help is greatly appreciated. :3 welcome. hope it comes in handy
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Posted: Sat Sep 01, 2012 6:56 pm
Converting Degrees to Decimal is something you're calculator does. I've always been taught to put into a calculator but there is a formula if you want that.
The degrees and minutes and seconds is used in navigation. It's longitude and latitude.
So Degrees to Decimals
Decimal = Whole number of Degrees + (Minutes of Degrees/60) + (Seconds of Degrees/3600)
EX: Convert the angle 117°29'157" to decimal degrees and round to the nearest hundredth of a degree.
117 + (29/60) + (157/3600) = 117.5269°. The question was hundredth of a decimal degree so the answer you would put is 117.527°
And Decimals to Degrees
The whole units will again stay the same. The Multiply the decimal by 60 the whole number from than answer will be your minutes. Take the numbers right of the decimal from that and multiply again by 60 that becomes the seconds.
Take your three sets of numbers and put them together, using the symbols for degrees (°), minutes (‘), and seconds (").
EX: Convert 121.135° to degrees, minutes, and seconds.
121.135° longitude. Degree number is 121°
135 x 60 = 8.1 The 8 becomes the minutes 8'
.1 x 60 = 6 The 6 becomes your seconds 6"
121°8'6" longitude would be your answer.
Does that help any?
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Posted: Sat Sep 01, 2012 7:10 pm
Malacina Converting Degrees to Decimal is something you're calculator does. I've always been taught to put into a calculator but there is a formula if you want that. The degrees and minutes and seconds is used in navigation. It's longitude and latitude. So Degrees to DecimalsDecimal = Whole number of Degrees + (Minutes of Degrees/60) + (Seconds of Degrees/3600) EX: Convert the angle 117°29'157" to decimal degrees and round to the nearest hundredth of a degree. 117 + (29/60) + (157/3600) = 117.5269°. The question was hundredth of a decimal degree so the answer you would put is 117.527° And Decimals to DegreesThe whole units will again stay the same. The Multiply the decimal by 60 the whole number from than answer will be your minutes. Take the numbers right of the decimal from that and multiply again by 60 that becomes the seconds. Take your three sets of numbers and put them together, using the symbols for degrees (°), minutes (‘), and seconds ("). EX: Convert 121.135° to degrees, minutes, and seconds. 121.135° longitude. Degree number is 121° 135 x 60 = 8.1 The 8 becomes the minutes 8' .1 x 60 = 6 The 6 becomes your seconds 6" 121°8'6" longitude would be your answer. Does that help any? Yesyesyes. That helped a TON. I guess I just have a really stupid question now.. but when it says convert to deg/min/sec, will the min always have a ' and the seconds have " after it? After you said your calc does it, I found this, which is why I asked the question. (I have no idea how to use my graphing calculator.. lol) http://www.satsig.net/degrees-minutes-seconds-calculator.htm
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Posted: Sat Sep 01, 2012 7:14 pm
Also, thanks SO much, I got an 8/10 on that homework by using the link I showed(I only didn't know how to do those two questions).. the other question hasn't been graded yet since it is an essay question. But, do you think you could tell me if it is right or not? My teacher doesn't really give comments, she will just say 'review arc formula, check values, etc'. Use the arc length formula and the given information to find s. Show your work for full credit.
r = 20 ft θ = 19° s = ? S = rθ
S = 20(19)
S = 380
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Posted: Sat Sep 01, 2012 7:28 pm
Yes, the seconds and minutes should always be labeled as such. It's like their units and you always put your units. Hmm, Arc Length of a Circle is defined as the length of the arc formed by an angle θ in a circle of radius r. The arc length of a circle is given by the arc length formula, S = r X θ. Which means you used the right formula. Always a good thing. S represents the arc length r represents the radius of the circle θ represents the angle in radians made by the arc at the centre of the circle. So yeah, what you did should be right. Just makes sure in your calculator that you have it set for radians and not degrees! And graphing calculators. I'm not too good with them, but there are a few pages over how to use them. Here's one. http://mathbits.com/MathBits/TIsection/Openpage.htm
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Posted: Sat Sep 01, 2012 7:51 pm
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Posted: Sat Sep 01, 2012 7:54 pm
Oops, sorry. It was not telling me someone posted. Thanks for the links, I bookmarked them. :3  I don't understand this question out of the next section. again, this was not covered in the lesson.. and it is the only essay question.
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