Recently Active Questions

some questions for bitsat practice Q-1 \texttt{let x,y be selected from SET}\left\{1,2,3\cdots15 \right\}\\ what is the probaility that x^2-y^2 is divisible by 5 Q-2 find \sum_{1}^{16}{\frac{n^4}{4n^2-1}} ...

1) A chemical contained in tea is also contained in the bark of a tree. It is used for making ink removers. that chemical is a) tannic acid b)oxalic acid c)carbonate d) cellulose 2)which of the following cannot dissolve in ca ...

Find the limit(x→π/2) (sinx)tanx ...

find sum of max. and min. value of sin-1(2x) +cos-1(2x)+sex-1(2x) ...

If a2 , b2 , c2 in a ΔABC are in A.P. Prove that cot A, cot B and cot C are also in A.P. ...

Let us define two functions f (x) = ax2 + bx + c; a, b, c ∈ R & a ≠0 g (x) = dx2 + ex + f; d, e, f ∈ R & d ≠0 If both the equations has imaginary roots and real part of complex roots of both equation f(x) = 0 and g(x) ...

A person writes letters to 4 friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that : (i) atleast two of them are in the wrong envelopes (ii) all the letters are ...

lim(x→0) sinxlog(sinx) ...

let ABC be an acute angled triangle whose orthocentre at H. altitude from A is produced to meet circumcircle of the triangle ABC at D. then the distance HD is.....?? ...

i am a dropper and i have got 272 in bitsat 2010. i will b in eml of iitjee and arnd 25k in aieee. plz tell whether i will be able to get any msc in goa or pilani ...

suppose a and b are real numbers such that the roots of the cubic equation ax^3-x^2+bx-1 =0 are all positive real numbers. Prove that: (i) 0<3ab\le1 and (ii) b\ge \sqrt{3} ...

Consider a drop of conducting liquid in gravity free space. Its radius is R while the surface tension of the liquid is T. Now the drop is supplied some charge Q. For what values of Q is the drop stable. ...

If 12cot^3@ - 31cosec@ + 32= 0 then find sine@ @= theta ...

hopeless chem questions Q1. Choose the incorrect statement (a) In [Fe(CN)6]4- , Fe-C bond length is smaller than Fe-C bond length in [Fe(CN)6]3- (b) EAN of Fe in [Fe(CN)6]4- is 36 (c) [Fe(CN)6]3- is more stable than [Fe(CN)6] ...

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Make the numbers 123456789 add up to 100, by inserting any of these arithmetic operations (+ - * /) into the string of numbers (and keeping the numbers in the above order). I've seen this in a book somewhere, and I think the ...

i am a starter in physical chemistry is arihant objective approach towards physical chemistry a better book or sholud i buy standard physical chemistry book??? plz help ...

Lt [16-16cos(10 cos x)]/x4 x→o ...

I agree that the figs r tooooooo tiny But plzz use ur magnifiers *Image* ...

Three people are eating at a restaurant. The waiter gives them the bill, which totals up to $30. The three people decide to share the expense equally ($10 each), rather than figure out how much each really owes. The waiter gi ...

Adminstrators attention seeking thread.[ students can give their problem of latex here] Sir latex function in this site of many others including me is not functioning. Clicking on the latex tab opens the latex window but afte ...

(%) Optical glass has high percentage of (A) MgO (B) B2O3 (C) PbO (D) Al2O3 Ans PbO ...

*Image* which theorem has been used to solve this question ? I have never studied this in my NCERT. ...

Today's question has three parts(fairly easy) -: (a) The rate law for the substitution reaction of 2-bromobutane and HO- in 75% ethanol/25% water at 30°C is given as Rate = 3.2 x 10-5 [2-bromobutane][HO-] + 1.5 x 10-6[2-brom ...

what is the product formed when AlCl3 is added to 4 chloro-1-phenylbutane? ...

A boy pushes a cylinder of mass m1 with a help of a plank of mass m2 as shown in the figure .There is no slipping at any contact. The horizontal component of force applied by the man is F . Find a) Acceleration of the plank a ...

Differentiate with respect to x, sec-1 x+1/x-1 +sin-1 x-1/x+1 ...

*Image* This one is from the scientific american book of puzzles and diversions.. ...

f[x]= [2Ï€-3]3 +2x-cos x Find.. ddxf-1[x]=? at x=Ï€ Note-[x] is not any greatest integer func.,just my keyboard wasn't working. ...