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Catalogs Discussion Forums -> Integral Calculus -> find the integral -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]

Catalogs Discussion Forums -> Algebra -> Let an be the nth term of an A.P. show that a1^2 - a2^2 + a3^2 ? a4^2 +?..+ a2n-1^2 ? a2n^2= n -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

take  AP  as 1,2,3,4,...............     and susbstitute.  lolz

Catalogs Discussion Forums -> Analytical Geometry -> Good Circles Problem -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Since the circle is circumscribing the rectangle,the vertices of the rectangle lie on the circle.

We can consider the general eqn of circle and sub the given vertices ,Also the centre lies

on the given line.Sub the centre (-g,-f).Now solve for  g and f.After g and f are found,we can

take the centre as the midpoint and and find the diametrically opposite ends of the given

vertices.By this we can get the remaining 2 vertices,Now,its easy to find area !

Catalogs Discussion Forums -> Integral Calculus -> Limits -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
http://latex.codecogs.com/gif.latex?lim_{x\to0}\frac{(1+tan^{-1}3x)^{-3}-(1+sin^{-1}3x)^{-3}}{(1+sin^{-1}2x)^{-2}-(1+tan^{-1}2x)^{-2}}
Catalogs Discussion Forums -> Organic Chemistry -> Alcohol -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Conversion of cyclohexene to cyclohexanol can be conveniently achieved by
a)NaOH-H2O
b)Br2-H2O
c)Hydroboration oxidation
d)Hydroboration hydrolysis

Catalogs Discussion Forums -> Integral Calculus -> Area -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Find the area bounded by the curves x2+y2=4,   y=x2+x+1,
y=[sin2(x/4)+cos(x/4)] and the x-axis,where [.] denotes greatest integer function

Catalogs Discussion Forums -> Integral Calculus -> Integrate -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

\int \frac{1-x^2}{(1+x^2)\sqrt{1+x^4}}dx

Catalogs Discussion Forums -> Trignometry -> Trigonometry -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]

Consider P,We know that cot(7pi/14) =cot(pi/2)=0 ==> P=0

If 'k' represents angle,then

cot(180-k)=-cotk

So,for S,cot(13pi/14)=-cot(pi/14)

Similarly,other terms can be changed and we get the sum to be zero,Therefore,S=0,P=0

 

Catalogs Discussion Forums -> Integral Calculus -> Integral -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

\int \frac{xdx}{(x^2+a^2)\sqrt{x^2+b^2}}

Catalogs Discussion Forums -> Organic Chemistry -> Aryl Halides -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Which of the following reagents can be used to distinguish chlorobenzene from chloro cyclohexane
a)AgNO3/C2H5OH
b)Ag(NH3)2OH
c)Na fusion,HNO3,AgNO3
d)Br2/CCl

Catalogs Discussion Forums -> Integral Calculus -> Integrate -> Go to message
This Post 9 points    (Olaaa!! Perrrfect answer.   in 3 votes )   [?]

\int \frac{dx}{1+x^{4}} \\ = \frac{1}{2}\int\frac{1+x^{2}+1-x^{2}}{1+x^{4}}dx \\ = \frac{1}{2}\int\frac{1+x^{2}}{1+x^4}+\frac{1-x^{2}}{1+x^4} \\ \text{Now,divide the numerator and denominator by} \ x^2 \\ \text{It will be easy to solve after this}

Catalogs Discussion Forums -> Organic Chemistry -> Alkyl Halides! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

@Ultimator,What do you mean by """" substances like alcohols with -OH group at the second position"""" in this case???

Catalogs Discussion Forums -> Organic Chemistry -> Alkyl Halides! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
well,c) is correct for the first one,but pls explain it!!!
Catalogs Discussion Forums -> Organic Chemistry -> Alkyl Halides! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Catalogs Discussion Forums -> Inorganic Chemistry -> Colours -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Colours in complexes are decided by the constituents of the coordination sphere, right? So why do K4[Fe(CN)6](colourless) and Cu2[Fe(CN)6](chocolate brown) differ in colour though coordination sphere is intact?

Catalogs Discussion Forums -> Integral Calculus -> http://www.goiit.com/posts/list/integral-calculus-integrat-918045.htm# -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Please ignore this!


Catalogs Discussion Forums -> Integral Calculus -> Integration -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Re:Integration
Catalogs Discussion Forums -> Integral Calculus -> Integration -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 

Catalogs Discussion Forums -> Integral Calculus -> Integration -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

If y(x)=  then the value of dy/dx at x= is


 


a)\pi \\ b)0 \\ c)2\pi \\ d)\pi/2

Catalogs Discussion Forums -> Algebra -> Probability -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Numbers are selected at random one at a time,from the numbers 00,01,02,...99 with replacement.An event E occurs if and only if the product of the two digits of a selected number is 18.If 4 numbers are selected ,then the probability that E occurs at least 3 times,is



a)97/390625



b)68/390625



c)72/390625


d)79/390625
 
 
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