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solve for x,y x2+y(x+1)=17 and y2+x(y+1)=13 ...

please tell me any good online book for trignometry ...

4^{log_{2}2x}=36 ...

Pls tell me if any one has good study material for jee and could pass it on to me for free ...

For the reaction, A⟺B,Kc=([B])/([A]) Kc<1 ⇒([B])/([A])<1⇒[B]<[A].If the concentration of reactants is more then the reaction must proceed in forward direction. But my book is writing that the reverse reaction i ...

1.If A+B+C = ∏ and A,B,C belongs to (0,∏/2) then prove that secA +secB +secC≥6 2.Prove that sinx.sin2x.sin3x <9/16 3.Prove that in triangle ΔABC cosec A/2 + cosec B/2 +cosec C/2 ≥ 6 4.Prove that in triangle ΔABC ...

If n is an even number and α, β are the root of the equation x2 + ax + b = 0 and β/α is a root of eqn xn + 1 + (x+1)n = 0, and f(x) = x2n + anxn + bn, then which of the following is (are) necessarily true? (a) f(αn) = 0 ...

If α, β are the roots of the equation x2-2x-a2+1 = 0 and γ, δ are the roots of the equation x2-2(a+1)x+a(a-1)=0 such that α, β belongs to (γ,δ) , then find the values of ‘a’. ...

Which is not true for displacement. ? ...

sir i m getting ece at nit bhopal in 2nd round of aieee counselling, n ihave filled ece nagpur n ece warangal above it . can anyone tell me whether ece at bhopal better or nagpur? ...

1.prove that sinx.siny.sin(x-y) + siny.sinz.sin(y-z) + sinz.sinx.sin(z-x) + sin(x-y).sin(y-z).sin(z-x) = 0 2.f(α,β)= cos4α/cos2β + sin4α/sin2β then prove that f(α,β) = 1 3.cosA = tanB, cosB = tanC and cosC= tanA then ...

help me out on these ones.... 1)The perimeter of the sector of a cricle is equal to the circumference of the semi circle of the same radius.Find in circular measure the angle subtended at the centre by bounding radii of the s ...

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i cudnt understand a single term, but seems that all r some hi fi concepts.may be many of u know the meaning of these words (lyk our forum experts and johny)........... G. H. Hardy quotes: "The limitations of his knowledge we ...

s=1+2+4+8+16+..........∞ now 2s=2+4+8+16+........∞ so, 2s=s-1 s=-1 but, s=1+2+4+8+16+..........∞ i.e., s=+ve so,-1 is positive ohh my god!! i ll get mad!! :P ...

A fun result. Its more suited for 11th students A sequence is as follows: 1,2,3,4,5,10,20,40,80,160,... i.e. the 1st 5 nos. in AP and then onwards a GP. Prove that every natural number can be obtained as sums of distinct term ...

1)There are seven people in a elevator.The lift stops at 3(unspecified) floors.In each stop or more people get out, but no one boards it.After 3 stops it is found that the elevator is empty.Find the no. of way this can happen ...

The area bounded by the curve x2/3+y2/3=a2/3 Can someone please tell how to solve these kinds of questions in general? Thanks! ...

how is *Image* where *Image* i.e is how is \prod_{k=1}^{n}{\frac{1}{x^2-2x\cos \alpha+1}}=\frac{1}{n}\sum_{k=1}^{n}{\frac{1-x\cos \alpha}{x^2-2x\cos \alpha+1}} ...

help me out on these ones.... 1) The greastest angle of a cyclic quadilateral is three times the least angle and the other two angles are in ratio 4:5.Find the angles in circular measure? 2)If the circumference of circle be d ...

1.The area of the region between x-y+2=0 and curve x= y , y axis is 2.The area inside the parabola 5x2-y=0 but outside the parabola 2x2-y+9=0 What I did for both the sums was first get a quadratic eq. and solve it to get the ...

5x/2 -2x =1 ...

can u plz tell me who all can do certificates/admit cards attested except school principals? ...

1) 4.9g of KClO3, on heating shows a wt loss of 0.384g. What per% of the original KClO3 has decomposed? 2) 1.84g of of a mixture of CaCO3 and MgcO3 was heated to a constant weight. The constant weight of the residue was found ...

A spherical capacitor has inner and outer radius a,b respectively.The space is suddenly filed with a medium of dielectric constant k=1.The charge on inner plate is +q,outer plate -q.Suddenly,the medium becomes conducting with ...

1.Prove that sin2nx + cos2nx ≤ 1 for all x and n≥1 ...

1.A block of mass m is placed on a smooth wedge of inclination theta.The whole system is accelerated horizontally so that the block does not slip on the wedge. What is the magnitude of force exerted by the wedge on the block ...

solve for x,y,z xy+x+y=23 xz+x+z=41 yz+y+z=27 ...

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I am going to apply for KVPY..in 2010..I will be in NIT Durgapur most probably..1st year..Can you give me some ideas for project.. Others also please suggest specially the ones who have appeared for it earlier.. ...