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If cos (θ – α), cos θ, cos(θ + α) are in HP, then cos θ sec (α/2)is equal to (a) -1 (b) − 2 (c) 2 (d) 2 ...

in general , how can carbonate vs. bicarbonate detection test be carried out?? ...

The potential energy of a force field is given by U(x,y) = sin(x+y) . The force acting on the particle of mass m at (0,pi/4) is: (A) 1 (B) root 2 (C) 1/root 2 (D) zero i m usin F = -dU/dr .............but after that what shud ...

sin(sin-1x) and sin-1(sinx) ...

Let V and E denote Gravitational Potential and Gravitational field at a point. Is it possible to have V=0 but E≠0 ? ...

when the targetiit all india test series is going to start ...

What is the minimum speed to hit the co-ordinate (a,b) if fired from the origin ? (gravity = g , along negative Y axis) ...

A point P moves inside a triangle formed by A(0,0), B(1,1/ 3 ), C(2,0) such that min{PA,PB,PC} =1, then the area bounded by the curve traced by P is.... (a) 3 3 - 3∩/2. (b) 3 + ∩/2. (c) 3 - ∩/2. (d) 3 3 + 3∩/2. i am n ...

0≤i<j<k<l≤nΣΣΣΣn ans: n(n+1C4) ...

What maximum volume of 3M KOH can be prepared from 1L each of 1M KOH and 6M KOH .... (1) By using water (2) Without using water ...

*Image* An circular Iron rod of radius r is put into an inverted cone which rotates with an angular velocity 'w'. If the mass of the ring me M find the tension in the the Iron rod if it rotates with the the cone without slidi ...

OUT OF 30 TICKETS MARKED WITH NUMBERS 1 TO 30 , 3 ARE DRAWN AT RANDOM ; FIND THE PROBABILITY THAT THESE ARE IN GEOMETRIC PROGRESSION. PLS. HELP ME WITH THESE SUM. pls... tell how the answer comes... ...

a ball is thrown upwards from the surface of earth . while the ball is moving up, (a) the earth remains stationary while the ball moves upwards (b) the ball remains remain stationary while the earth moves downwards (c) the ba ...

Consider the polynomial f(x) = ax2+bx+c. If f(0) = 0 and f(2) = 2, find the minimum value of \int_{0}^{2}{\left|f'(x) \right|}dx equals?? i get 2a+b=1 (simple), but how to get the value of -b/2a?? ...

A rod of mass m, length l is hinged at a distance x from the top.A force F is apllied at the bottom.Find x such that hinge reaction is 0. ...

1/secA-tanA prove this is equal to secA+tanA ...

Dear all, Presently i am studying EEE, in trivandrum engg college, and i am preparing for jee 2011 and also aieee 2011,my semester exams are approaching and they will be during march 2011, so what should be my preparation, du ...

Hello Friends.. I am thinking of enrolling with Brilliant for the B.MAT Test Series for IITJEE 2011...Please tell me about it..as in how are the tests and the difficulty level..and is it realli worth it.. i no its too late fo ...

which block does this element belong to?? [Xe] 6s2 4f7 5d1 a)s-block b)p-block c)d-block d)f-block Give proper reason plzz!:) ...

what is the oxidation state and no. of unpaired electrons of Fe in [Fe(H2O)5NO]SO4 the answer for oxidation state is given +1 and no. of unpaired electrons is given 3 how can these both be simultaneously true no of unpaired e ...

Prove that \sqrt [44] {\tan 1^{\circ} \tan 2^{\circ}...\tan 44^{\circ}} < \sqrt 2 -1 <\frac{\tan 1^{\circ} + \tan 2^{\circ}+...+\tan 44^{\circ}}{44} ...

Hello! I get around 180 in the IITJEE pattern in my coaching institute.I will now seriously start preparing for the exams as there is hardly any time left.I am mainly concentrating on BITSAT and AIEEE as I find tho se questio ...

You have 2 balls. Both are identical in size and mass, but one is made of gold and is hollow,the other is not hollow and made from titanium. Find out which is which ball, and lets say both are covered with a black paint that ...

another quesn : 1. Let b not equal to 0 and for j = 0 , 1 , 2 , .........,n let Sj be the area of the region bounded by the y - axis and the curve xeay = sin by , j pi/b is less than equal to y is less than equal to (j+1) pi ...

1)what do we mean by reversible electrodes.For example we say the quinhydrone electrode is reversible wrt H+ ions. why. 2)what is the use of metal-metal's insoluble salt-salt anion solution? 3)what happens in this cell and wh ...

how HCl can be dried by passing through conc. sulfuric acid? ...

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guys the reason why we left goiit was that there was no one intrested in solving a sum... now i see to some extent the same with targetiit.... means the moderate sums okk respns is good but for any top sup over the edge sum n ...

does sodium acetate & dilute HNO3 make a buffer solution? ...

if the acceleration is directly proportional to time. then the displacement is? ...