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watevr himanshu... i think i am going to logout frm here, forevr... seriously its disgusting!!!

its nt the site, what it used to be once, wen i joined it!!! all sorts of crap going on...huhh... newaz i dnt need to tell wats going on n wat not.... !!

thnQ for the post!!

check out the givn link... it contains the answer to ur question (m not doing copy-paste, cuz u urself can surf the site, to knw wat exactly u need to learn )

http://www.chemguide.co.uk/organicprops/alcohols/background.html#top

yeah 1 / cosec t = sint t

nd integrating sin t wrt t, we have -cos t ...

well, C/C++ is taught to evry engg studnt in 1st yr, irrespctiv of branch

for learning C/C++ book by e balaguruswami (ANSI C) is gud..it has xplained almost evrything...besides this, u can try 'Let us c, by yashwant kanetkar' .... its also gud

$\int dx / ln x = li x$

whr li x is the lograthmic integral function...

basically this is not in JEE syllabus... still if u want to knw, here's the link http://mathworld.wolfram.com/LogarithmicIntegral.html

dnt go for finar, its the ultimate book..not for learning concepts..but for strengthning the already knwn ones...

for proper concepts, study Morrison-boyd.. its gud... nd for practice, u can have arihant's material ...if u r having someone to guide u , as thr r some mistakes in it.... or u can even solve the fiitjee or BT's package...thr problems r also gud!!

this can be xplained thru the uncertainity principle..

radius of nucleus is of the order of 10^-15 m

the maximum uncertainty = 2r = 2 X 10^-15m

thus, $\Delta x .\Delta v \ge h/4\Pi m\Rightarrow \Delta v \approx h/ [8\Pi ({10}^{-15}) (9.1 X {10}^{-31})]$

this upon solving will give V > 3 X10⁸ m/s which is not possible...

thus electron cannot exist within a nucleus

do fill the forms... u never knw wat results would be.... 06 mein i was xpecting over 60 % marx in aieee...n i got just 40%... nd result was i droppd the yr... so i'll advice..dnt take risk... forms fill karne mein kuch nahi jata!!

well aieee is over.... n all knw it now!!

for 2nd question, its defined only when log (cos 2pix) > 0

=> cos 2pix >= 1

=> cos 2pix = 1

=> 2pix = even multiple of pi

=> x is an integer....

nd...pls correct ur 1st question..

$\Sigma r {x}^{r-1}$ = x + 2x + 3x² + 4x³ + ..... nx^n-1

u knw that 1+x +x² + x³ +... + xⁿ = 1-xⁿ⁺¹/ 1-x

differentitaing, u'll get the answer,

x + 2x + 3x² + 4x³ + ..... nx^n-1 = {(xⁿ⁺¹-1) / (1-x²) } - {(n+1)xⁿ / (1-x)}

exactly...predictions r useless.... cuz its percentile...not percent that matters....

well pooja m really sorry, but i dnt knw anything bout the exam.... u nudged me to reply..so doing...bt really i dnt knw nething bout it!!!

same as http://www.goiit.com/posts/list/counselling-i-think-i-will-get-180-marks-in-aieee-shuld-i-apply-56936.htm

yeah..u shud... most probably u'll get it!