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$Q:$\Rightarrow$ There are 4 machines & it is known that exactly 2 of them are faulty. They are tested, one by one, in a random order till both the faulty machines are identified . Then the probability that only 2 tests are n ...

1) When an object is at a distance x1 and x2 from the poles of a concave mirror , imagesm of same magnification are formed. The magnitude of the focal length of the mirror is : a) \left|\frac{x_{1}+x_{2}}{2} \right| b) \left| ...

Can we prove the different identities in trignometry? Like sin(A+B) = sinAcosB + cosAsinB and so on. I STUDY IN CLASS IX AND I WANT TO PREPARE FOR IIT. WHAT SHOULD I DO? PLS. GUIDE ...

10 ml of acetone is mixed with 100 ml water. The vapour pressure of water above the solution is ...

*Image* detailed ans shall be appreciated.... ANS--B ...

http://www.youtube.com/watch?v=JF61lhEeGng share your opinions ...

A mechanism with 2 sliders is shown in the fig. Slider A at the instant shown has a speed of 3 m/sec and is accelerating at the rate of 15 m/s^2 towards rite at the given instant . If rod AB has a length of 3m and \theta is 6 ...

Two circles touch externally at P and AB is a common tangent to the circles. Then LAPB is equal to ....... (A) 300 (B) 450 (C) 600 (D) 900 ...

f(x)=cos x/{[2x/pi]+0.5} where x≠integral multiple of pi,[.]=greatest integer function is f(x) even/odd/neither ...

A Long pliablle carpet is laid on ground. One end of the carpet is bent back and pulled backwards with a constant velocity of 16 m/s. If mass/length of the carpet is 1 Kg/m , the minimum force required to pull the carpet is : ...

please prove the following a3 sin(B-C) + b3sin (C-A) + c3 sin (A-B) = 0 ...

*Image* In the above figure we see four line segments intersecting at A,B,C and D respectively. LA = 900, LC = 900. Surely, LB = LD = 900. So how can we prove it theoretically...! Practically its true and obvious but can that ...

Let p(n) denote the number of ways in which n can be written as a sum of positive integers. (order of the summands being irrelevant). prove that p(5k+4)≡0 (mod 5) where k is any positive integer. ...

if a denotes the number of permutations of (x+2) things taken all at a time,b the number of permutations of x things taken 11 at a time and c the number of permutations of (x-11) things taken all at a time such that a=182bc, ...

Q1) How many real solutions of the following equation are possible:6x2+77[x]+147=0 where [x] is Greatest Integer Function of x . ...

consider a m*n matrix what do we mean when we say m and n have same parity? ...

what is the product A?? http://img266.imageshack.us/i/43982323.png/ ...

consider a m*n matrix what do we mean when we say m and n have same parity? ...

about what axis would a uniform cube have its minimum and max moment of inertia . explain pls the approach of solving it. ...

A system of binary stars of masses ma &mbare moving in circular orbits of radii ra and rbresp..If Ta and Tbare time periods of masses respectively then ...

can anyone upload narayana part test 4...... question paper .i've got 3 part test papers ......it will be very helpful ...

might not be new info and is pretty useless... but thought I should let you know that JEE 11 will be conducted by IIT K so expect a nice paper in phy :) ...

refer this link- http://jee.iitm.ac.in/QP_M1_ANS.pdf See question number 41 in maths (Paper 1) The answer given is A which is 22/7 - (pi) 22/7 - pi is also equal to 0 right? So C should also be there in answers. Am I wrong an ...

if f(x)=√(x-m+1), for x in [m-1,m), m=integer,then evaluate *Image* where n=natural number. ...

how to get all india rank <=1500 i want some good statergy given by iitians or it mentors ...

Which mathematics book(s) are best for concept clearance for IIT-JEE which explains every topic from the zero level ? ...

$Calculate $\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\frac{cosx-xsinx}{x^2+cos^2x}dx$ ...

a) x = 2.0 cos (50t + tan–1 0.75) = 2.0 cos (50t + 0.643) v = dt dx = – 100 sin (50t + 0.643) the square is pie.....? can u explain hw we get this? ...

$Determine a positive integer $n$ for which \\\\ $\underbrace{\sqrt{6+3\sqrt{2+\sqrt{2+\sqrt{2........+\sqrt{2}}}}}}_{(n)-times}=2\left \{ sin(\frac{35\pi}{96})+cos(\frac{19\pi}{96}) \right \} ...

prove *Image* ...