Does anyone use integrals on a weekly basis?
463004
Only 10 times in a year.
823951
Monday and Thursday,\nBut can you be more specific about what you mean exactly.
105064
Every day, sometimes twice. : )
215888
An hour or two of personal time is a good thing for me. So yeah, a slightly different schedule would be nice to have.\n\nGood question.
109917
Every Tues and Wednesday.  This week and the next 2 weeks Tuesday, Wednesday and Thursday.
822637
When I have problems with an indefinite integral I use some of my symbolic software to get straight to answer or a "Table of Integrals".  And then I focus on how to get to that particular answer, whether it is through substitution, changing it to a double integral in polar coordinates, etc.\n\nA "free" online integrator program that is offered by Wolfram (maker of Mathematica) is located at\n\nhttp://integrals.wolfram.com/\n\nType your particular problem as\n \nArcTan[1/x] \n\nand it will give you an answer that is solved symbolically for an "indefinite" integral which is\n\nx(arctan(1/x)) + (1/2)(log((x^2) + 1))\n\nHowever to be honest with you it was a few years back when I saw this particular integral, and I honestly don't remember the process.  I think it was a definite integral though.
177784
take a seat and do some fractions
63173
It depends on your definition of normal. ;)  I would venture to guess that 2-3 times a week is normal, although we go for 6-7.  It is all personal preference.
87512
Only on the weekends...
535779
once every 2 weeks\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nsometimes once a week
530030
Yes, 5 or 6 days of the week.\n\nBut then, my wife is a home economics teacher.
521859
http://www.learner.org/jnorth/tm/humm/NestWeeklyCQs.html
662203
F S  S....the days of the week
396972
ok.but better if only thrice a week.
744417
My answer assume that you have a good knowledge of integral calculus. If it's not the case, then use a soft like Matlab...\n\nNotations :  I will use SIGMA for the 1 to infinite sum and INTEGRAL for the integral between -T/2 and T/2.\n\nIf you consider a periodic signal x(t) with a T = 1/f0 period, its Fourier development is :\n\nx(t) = a0/2 + SYGMA[k=1 -> infinite]  (ak*cos(2*PI*f0*t)) +  SYGMA[k=1 -> infinite] (bk*sin*(2*PI*f0*t))\n\nwhere f0 = 1/T is the fundamental frequency  of the signal, a0/2 the mean value and ak, bk are the Fourier coefficients in cosinus and sinus.\n\nThe Fourier coefficients are calculated like this :\n\nak = 2/T * INTEGRAL[-T/2 -> T/2] (x(t)*cos(2*PI*k*f0*t) dt)    for k >= 0\n\nbk = 2/T * INTEGRAL[-T/2 -> T/2] (x(t)*sin(2*PI*k*f0*t) dt)     for k >= 1      \n\nAfter developpement, you will find the values  of all a and b coefficients in function of k.\n\nI hope this will help :)
178686
every day if possible..at least 3 times a week..or more than one time a day.
218023
With others, occasionally.\n\nWith myself, every day. Sometimes twice or thrice.