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seen Sep 2 '13 at 3:01

Oct
17
revised How to Evaluate $ \int \! \frac{dx}{1+2\cos x} $ ?
added 2 characters in body
Oct
17
accepted How to Evaluate $ \int \! \frac{dx}{1+2\cos x} $ ?
Oct
17
comment How to Evaluate $ \int \! \frac{dx}{1+2\cos x} $ ?
Thanks. Seems I did the same exact thing, I think I just messed up with the simplification after making the $\cos x$ and $\mathrm{d}x$ substitution. Good work. I will go back and make sure I get $\int \! \frac{2}{3-t^2}\,\mathrm{d}t$. Do you not get $-\int \! \frac{2}{t^2-3}$ after simplifying? Is there something I'm not seeing you pulled out?
Oct
17
asked How to Evaluate $ \int \! \frac{dx}{1+2\cos x} $ ?
Oct
3
answered Numerical software to solve partial differential equations in spherical coordinates?
Oct
1
awarded  Civic Duty
Oct
1
comment Question about percentage
Maybe the $4$ needs a % sign?
Sep
12
accepted Describing a Wave
Sep
12
comment Describing a Wave
Anon, Okay, I understand. I was trying to say what needs to be changed to accommodate for the x-axis to be $4$ milli seconds instead of just 4, to keep the wave still showing how it is. So, i.e., $x$-axis goes from 0 to 0.004.
Sep
12
comment Describing a Wave
Anon, how would you adjust the factor $8$ and others if needed, to accommodate for the time axis being $4$ms instead of $4$?
Sep
11
comment Describing a Wave
Very much appreciated and as you should for referring back to. We could all learn and benefit from different methods for accomplishing the same results. :)
Sep
11
comment Describing a Wave
Anon, Brilliant! I did not see this with the use of the square wave. Ingenious answer. I was thinking its some sine wave of some angular frequency * some function to get that negative part of the wave. But very nice. How did you analyze this so fast? :) I'm just curious. hehe
Sep
11
comment Describing a Wave
J.M. +1... Very nice thought there. What made you see this?, using the tool of the floor function. Which part of the floor actually affects the wave?
Sep
11
comment Describing a Wave
Percusse, thanks. I see where you were trying to go with this but thanks anyway. This is an insightful way to think of it and I will see if I can finish what you started. :)
Sep
11
asked Describing a Wave
Aug
18
revised Still stuck on treacherous ODE
Fixed Formatting of Primes.
Aug
18
suggested suggested edit on Still stuck on treacherous ODE
Aug
15
awarded  Excavator
Aug
8
revised Evaluate the integral as a power series $\int x^{11}\cdot\tan^{-1}(x^2)\,\mathrm dx$
formatting
Aug
8
suggested suggested edit on Evaluate the integral as a power series $\int x^{11}\cdot\tan^{-1}(x^2)\,\mathrm dx$