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For any real value of A and n ε N cos A.cos 2A. cos4A .cos 8A. .................... cos 2n-1A equals 1 -1 sin(2nA) /2n sin A 2 ...

[x]+[2x]+[4x]+[8x]+[16x]+[32x]=12345 where[]-GIF ...

Tangents at a point P1 (other than(0,0) on the curve y=x3 meets the curve again at P2. The tangents at P2 meets the curve at P3 and so on. Show that the abscissae of P1,P2, P3,.....Pn form a G.P. Also find the ratio of area o ...

let f(X) be a continous funtion such that f(x)>0 and f(x)^101 =1+∫ f(t)dt.[integrate from 0 to x] the value of (f(100))^101 a) 99 b) 100 c) 101 d) 98 ...

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Q. as abv, no . of structural isomers of methyl anthracene is ___ ...

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*Image* Answer these two questions ...

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I don't know if it's true....but I just heard from a reliable source that this year's JEE paper will have no Assertion Reasoning question. ...

Q. Is the coulomb force that one charge exerts on the another changes if othere charges are brought nearby? A. No but then..everybody knows that electrostatic force follows ineverse square law....is there any difference betwe ...

1) A thin insulating rod is charged in a uniform manner & the resulting linear charge density is λ. The rod is bent into the shape of a semi-circle. Find the magnitude of the electric field strength at the centre. 2) A Gold ...

an emf of V = 150 cos 377t is applied to a pure resistor of resistance 50 Ω . what is frequency of power variation ...

Distribution coefficient of an organic acid between water and benzene is 4.0, in favour of benzene. 2.5g of acid is distributed between 25 ml of benzene and 50 ml of water Q1. amount of acid in 25 ml of benzene is Q2. molarit ...

Q1 Let h(x) = l kx+5 l and domain of f(x) and f(h(x)) are [-5,7] and [-6,1] respectively, then value of k is _____ (the answer is X if cant say) Q2. lim(x->0) [ sinx/x ] = _____ [lim(x-->0) sinx/x ] = ______ ...

Why is :CF2(difluorocarbene) more stable than :CCl2 and :CH2 ?? ...

kinetic energy of a system cannot be increased without applying any external force on the system. true or false????????? its given to be false????? how can this be????? ...

How many bridging atoms in ligands is/are present in [Fe4O(CH3COO)6]? ...

|z - 4| - |z - 5i| = k will represent hyperbola provided k will be (A) 6 (B) 7.5 (C) 1 (D) -1 (E) -3 MULTIPLE ANS QS ...

pi/2 ∫ [ k2(cos 3x + cos x/2 ) + sin x - 2k cos x] dx ≤ 0.... Number of values of k..........{where [.] is G.I.F} 0 { k belongs to I } [ANS >>>>>>>>>> 12] ...

pi/2 ∫ sin 2nx log cos x dx = 0 A)pi/2 B) pi/2 C) pi/2 ∫ cot cos 2nx dx ∫ tan cos 2nx dx 1/2n ∫ tan sin 2nx dx 0 0 0 ...

a constant electric current flows along a uniform wire with cross sectional radius R and heat conductivity coeff. K...A unit volume of wire generates thermal power α.Find the temp as function of distance r from the axis of t ...

how tto find out which one among the tautomers is more or less predominating??? for example in pairs like as follows.... 1.) *Image* 2.) *Image* please give full working...neither do i know the method nor do i have the answer ...

The coordination number of a metal crystallizing in a hexagonal closed packed structure is A. 12 B. 4 C. 6 D. 8 ...

Statement 1 : Band gap in germanium is small. Statement 2 : The energy spread of each germanium atomic energy level is infinitesimally small. ...

In a solid 'AB' having the NaCl structure 'A' atoms occupy the corners of the cubic unit cell.If all the face-centered atoms along one of the axes are removed,then the resulting stoichiometry of solid is --- A. AB2 B. A2B C. ...

Find out total number of moles of phenyl hydrazine used during glucosazone formation from glucose. INTEGER ANS TYPE ...

A man starts pulling the block with constant force F = 3 N, when the massless spring (of force constant 4.5 N/m) shown in figure is unstretched. At the instant spring is maximum elongated, man leaves the block. The kinetic en ...

Two identical metal plates are given charges q1 and q2(<q1) respectively. If they are now brought close together to form a parallel plate capacitor with capacitance C. What will be the potential difference between the plat ...

(CH3)2CHCOCH(CH3)2+(CH3)2CHMgBr (G.R) WILL PRODUCE????????? ANSWER EXPLAINING MECHANISM ...