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Find the integral of (cos^2(x))((cosxsin^2n+1)*(pi/2*sinx)+(sinxsin^2n+1)(pi/2*cosx)) from 0 to pi/2
 9 months ago
 9 months ago
Find the integral of (cos^2(x))((cosxsin^2n+1)*(pi/2*sinx)+(sinxsin^2n+1)(pi/2*cosx)) from 0 to pi/2
 9 months ago
 9 months ago

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primeralphBest ResponseYou've already chosen the best response.4
Input it more clearly.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
\[\int\limits_{0}^{\pi/2}\cos ^{2}x(\cos x \sin ^{2n+1}(\frac{ \pi }{ 2 }sinx)+sinxsin ^{2n+1}(\frac{ \pi }{ 2 }cosx))dx\]
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I don't have the first clue on how to use that
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
http://integrals.wolfram.com/index.jsp
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Wolfram sucks these days :(
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Thats what happens with all these free awesome programs
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Well, I don't think it even has CAS. I don't use it though.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Well if you wanna see the steps then you gotta have membership
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Well, I'd expect them to do that.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Ummm this is an annoying function. @Skip2mylou426 what r u currently studying?
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Wolfram was the best matrix calculator .........
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Think it's always been Matlab......
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Welll ya Dont have matlab. I used to have mathematica but my comp broke down so dont have it no more :(
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@Skip2mylou426 I think the integral can't be evaluated easily because of the form sin(acos(b))
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@swissgirl Yeah, if you're into coding, you'll fancy Matlab.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
I guess he went to the lou :)
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I was trying to type that monstrosity into Wolfram. Epic fail. It didn't work at all.
 9 months ago

doulikepiecauseidontBest ResponseYou've already chosen the best response.0
http://www.wolframalpha.com/widgets/view.jsp?id=dc816cd78d306d7bda61f6facf5f17f7 This might help too
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
It always happens to me
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
There is no free CAS engine...........unless you can hack. Otherwise, get your pen and paper.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
wait let me try wolframming it for u
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
A little rusty on the calculus. I haven't taken calc in 3 or 4 years unfortunately
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
What course are u taking now?
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@swissgirl No point. The integrand has the form of a switch variable 'n' which would leave the answer not numeric, but algebraic........which requires a CAS software.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
It's called Problem Solving. It's a combination of every type of math course that could've possibly been taken.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
haha not quite. He only gives us 1 point per problem solved. All work is required and 500 points are needed to get an A. Class has one month left (halfway done) and I have 178 points right now. KILL ME.
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
I don't see the point in putting that into an integral. The integrand can be simplified though....it just looks ugly.
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
dw:1372916840241:dw
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
dw:1372917002693:dw
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
.........then you start using the identities......
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Ohhhh cooollll Ya I shld have thought of cleaning it up by using identities :)
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Yeah, I'm sure you'd have figured it out eventually. It's just boring to look at.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
so clean it up using identities, then plug in?
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
is that a square that cuts off at the end?
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
dw:1372917328459:dw
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
thanks! think it'll be messy if I don't use identities first?
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Well, depending on how much math you know, yes and no. You might be able to notice the symmetry; and if you can't fiddle with it,
 9 months ago

hobbs978Best ResponseYou've already chosen the best response.0
@primeralph love your picture
 9 months ago

hobbs978Best ResponseYou've already chosen the best response.0
just thought i would point that out
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@hobbs978 Thanks. Yours too. No homo.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I appreciate your help!
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
You're welcome. Sorry I couldn't finish it; I'm kinda tired today.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
It's ok, I wish I even remembered how to start it. I feel like a failure.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
hahaha dont feel like one I took 2 semesters of stats earlier this yr and I cant remember pellet Yesterday I was looking at a question and was totally blank. I felt like the biggest failure
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
It's funny how the system changes your words by itself. We know what you meant to type instead of "pellet"........
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@Skip2mylou426 http://www.sosmath.com/trig/Trig5/trig5/trig5.html
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
So after plugging everything in...I come up with a big fat zero...
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
hahahahaha :D Just smile
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Well, zero is an answer...in many cases.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I may have made a mistake. ugh. ok I'm going to attempt to draw this.. hold on
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
dw:1372918536405:dw
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
ok so the \[\cos(0)^3\] is going to be equal to one and then I end up with..
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
dw:1372918796639:dw
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
what about the n?
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
Ok that's what I originally had. Sorry, don't hate me
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
No, I don't hate you. Stop bringing yourself down. Sure you're an awesome student.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I'm trying, I really am, but this class is insanely hard. The hardest class in our program is Modern Algebra (which I took last semester), and I thought that was easier than this. I'm at a loss. I don't know what to do.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Modern Algebra = Abstract Algebra?
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
Give or take. Our professor wrote the text for it
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
That's the sad part; when your course is customized.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Ok that is a really hard course.
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Well, it means you can't find the answers elsewhere......since the professor made them up.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
hahahaha yaaaaaa My abstract algebra course was customized too
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
Almost our whole department is like that. The worst thing is that the majority of our professors are researchbased and suck at teaching.
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Like most profs out there who cant teach
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
I learned a long time ago to never expect a professor to teach well. I just get the syllabus and do my thing.
 9 months ago

JhannybeanBest ResponseYou've already chosen the best response.0
Hmm.. @satellite73 perhaps?...
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
that's the issue with this class, he just gives you a bunch of problems with no material to work with
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
Get "Engineering Math by KA Stroud" Then go to "Advanced Engineering Math" by anybody.......but Kreyszig........that'll be later because it doesn't explain easy.
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
........you can get them online for free.....if you know your way.........
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I probably lack the necessary skills to do that. Can't hurt to try though
 9 months ago

swissgirlBest ResponseYou've already chosen the best response.1
Ya I only do free stuff. I got mathematica for free and all my textbooks in pdf formats
 9 months ago

JhannybeanBest ResponseYou've already chosen the best response.0
mathematica for free?....i hate you. I need to torrentthis.
 9 months ago

primeralphBest ResponseYou've already chosen the best response.4
@Skip2mylou426 The first book explains quite well. I've used it for HS students, so it should be cool.
 9 months ago

Skip2mylou426Best ResponseYou've already chosen the best response.0
I'll have to check it out soon. Thanks again for your help, I think I'm going to go die now :)
 9 months ago

experimentXBest ResponseYou've already chosen the best response.0
\[ \frac{2 (1)_{n1}}{\pi \left( \frac 3 2\right)_{n1} }\] http://mathworld.wolfram.com/PochhammerSymbol.html
 9 months ago
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