Recently Active Questions

eliminate θ frm \frac{cos(\alpha -3\theta )}{cos^{3}\theta }=\frac{sin(\alpha -3\theta )}{sin^{3}\theta }=m ...

Plz make me understand the meaning of quantum nos. & also principal quantum no.,azimuthal q.no.,magnetic q. no.,spin q. no.Explain me in such a way so that i can understand bcoz my new classes of XI have just started . ...

find the value of sin 2Ï€/7 + sin 4Ï€/7 + sin 8Ï€/7 7 /2 ...

Q) Evaluate \int_{0}^{1}{}(tx+1-x)^{n}dx where n is a positive integer and 't' is a parameter independent of 'x' . hence show that \int_{0}^{1}{x^{k}(1-x)^{n-k}}dx=[^{n}C_{k}(n+1)]^{-1} ...

hw do we calculate minimum distance btwn two given curves? ...

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mole concept 1.who started symbolic representation of elements which we use today a) dalton b) berzelius ...

PLS CHECK I THINK THERE R A FEW ERRORS ...

is tata mvgraw hill course in maths good? ...

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This one is a very very simple one for nay one in class xi-xii but ffor the sub xi guys.. Write 105 as teh sum of consecutive integers in 8 ways... Dont just give the answer but also think why it works! ...

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Plz solve this sum. If acos theta - bsin theta =c,prove that a sin theta + b cos theta= (a2+b2-c2) ...

Let f defined on [0,1] be twice differentiable such that |f''(x)|\leq 1 for all x \in [0,1] . If f(0) =f(1) , then show that |f'(x)|<1 for all x \in [0,1] i think such question need mathematically rigorous analysis like th ...

find the maximum product(approximate) of positive real numbers whose sum is 271 and also prove the result. try it very good question and very pretty answer... ...

Given that a,b are odd and c,d are even,then A. a2 - b2 + c2 - d2 is always divisible by 4 B. abc + bcd + cda + dab is always divisble by 4 C. a4 + b4 + c3 + d3 + c2b +a2b is always odd D. a +2b +3c +4d is odd ...

1. \lim_{n \to \infty} (1 + sin\frac{a}{n})^{n} 2. Function f(x) = (|x - 1| + |x - 2| + cosx), x\epsilon [0,4] is discontinuous at how many points? 3. \lim_{n \to \infty} (\frac{1}{1.3} + \frac{1}{3.5} + \frac{1}{5.7} +....+ ...

When Sachin Tendulkar travelled to Pakistan to face one of the finest bowling attacks ever assembled in cricket, Michael Schumacher was yet to race a F1 car, Lance Armstrong had never been to the Tour de France, Diego Maradon ...

Find all pairs (x, y) of integers such that x^3 - y^3 = 2xy + 8 ...

make 4 equilateral triangles with 7sticks (all the sticks are of equal length) ...

prophet sir .. have a try at this one :) Each of the boys A and B tells the teacher a positive integer but neither of them knows the other`s number.The teacher writes 2 distince positive integers on the blackboard and announc ...

how is new simplified physics my teachers had suggested it ...

BKS FR CHEM PRACTICE ONLY QUESTIONS I HVE NCERT ALREADY AND NOT MUCH QUE IN IT FOR COMPTETIONS ...

Prove that if z1 and z2 are two complex numbers and c>0 , then |z1+z2|2 ≤ (1+c)|z1|2 + (1+c-1)|z2|2 ...

bks fr chem org havig much explaination of concepts ...

\frac{9}{1!}+\frac{16}{2!}+\frac{27}{3!}+\frac{42}{4!}+... ...

bks fr physics for 12 which target only brds not entrances having gud theory and questions and would help me fr brds as nert language is very tough to understand plz reply ...

For natural n>1 let 3n+1 be a perfect square. Prove (n+1) can be written as a sum of 3 perfect squares, not all of which may be distinct. ...

Suppose f be a continuously differentiable function on [a,b] and twice differentiable at x=a with f''(a) being non-zero; that is, the limit \lim_{x\to a^+}\dfrac{f'(x)-f'(a)}{x-a} exists and is non-zero. Applying LMVT to f in ...

In a young's double slit exper. , light of wavelength 6000 A° is used to produce fringes of width 0.8 mm at a distance of 2.5 m . If the whole apparatus is dipped in a liquid of refractive index 1.6 the fringe width will be ...