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Prove: 1/(n+1) + 1/2(n+1)2 + 1/3(n+1)3 = 1/(n) - 1/2(n)2 + 1/3(n)3 ...

Asked by krish1092 2cos9xcos7x=2cos5xcos3x and 2sin5xcos3x=2sin9xcos7x ...

consider ΔABC, BC as base... BAC as the vertical angle.... now if i go on increasing the angle BAC to make it very large i.e. θ→180° it will become almost parallel to BC... then can we say that two parallel lines can for ...

There are many gud problems in it but many of them are solved by many just like maths... so solve the following question frm it and see urself. Q.A bent tube is lowered into water stream just as shown in fig water has velocit ...

U have n identical coins... How to divide it into k parts such that each part has a maximum of M and a minimum of N? ...

i am studying Xi standard. i hav to crack iit jee somehow. i am ready to work hard. i hav enrolled myself in a coaching instute in chennai. i dont know how to plan my studies . how to manage school syllabus and jee syllabus t ...

How could you make a lens to focus sound waves?consider waves in air and water ...

A thin transparent plastic bag has the shape of a converging lens when inflated with air.How does it behave optically when placed in water? ...

why cant f(x)=[x]+[-x] be differentiated even though f(x)=-1 for all x??? [x] represents the greatest integer function... ...

An empty dish gets hot in an ordinary oven whereas in microwave it does not.Why? ...

Find range of y: y=4{x}3-3{x}-1 ...

Prove that 3(cot2θ+tan2θ)-8(cotθ+tanθ)+10≥0 ...

The second one is a typical Grignard reagent , so it has a carbanion . which attacks on the electrophilic carbonyl gp on the substrate. furhter attack . the mechanism is given . I'm abit lazy . so ,I'didn't write ...

find the time taken by cylinder to reach O from A . ( g=10ms-2) OA =5m. *Image* unable to proceed. ...

∫xtanx dx can this be done!!! ...

The balls, having linear momenta p1 = pˆi and p2 = −pˆi , undergo a collision in free space. There is no external force acting on the balls. Let p'1 and p'2 be their final momenta. The following option(s) ...

Why is everyone crying about the experiment being conducted on the big bang theory? is it why media is shouting and crying.. i think this is all superstition people.. what do you think? ...

Hi I am AVIPSIT RATH of class 12th & i have not started reading anything of IIT till now. But i am confident that if you tell me that how to study then i will be able to crack IIT-2009. Moreover my one problem is that i alway ...

*Image* Find the time period of oscillation of the pulley in the system shown. The moment of inertia of the pulley about its axis is I & the string does not slip over the pulley. The string & the springs are light. Pls give t ...

0∫pi/4(etanx(secx-sinx))dx ...

A salt of Cobalt(2+) when dissolved in excess of HCl ,forms a 4-coordinated complex whose magnetic moment is found to be 3.87Bm.Predict the shape of complex,giving explaination. ...

if f(x)and g(x) are two functons with all real no.s as their domain, then h(x)= (f(x)+ f(-x))(g(x) - g(-x))..is... i) always an odd function ii) an odd function when both the f and g are odd iii) an odd function when f is ...

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An aqueous solution of methyl amine has pH value 10.64.How many grams of methyl amine are present in 100mL of the solution.Kb=4.4*10-4 ...

Ionic product of D2O is 1.33*10-15.For what value of pD will the solution be acidic? ...

Determine pH of a 5% aqueous solution of NaOCl(by weight).Density of solution is 1 g/cc.Ka=3*10-8 ...

The solublity of unknown salt MXn is 2*10-8M and its solublity product is 4.32*10-30.Formula of the salt is????? ...

Calculate pH of a 0.016M aqueous solution of Ca(CH3COO)2 .Ka=2*10-5 ...

A 0.1 M aqueous solution of acetic acid is being titrated against a 0.025M NaOH solution at 25°C.Determine pH at the end point if Ka of CH3COOH is 2*10-5 ...

Phenol is a weak acid used as a disinfectant.The pH of a 0.01M solution of a sodium phenolate is 11,what is pKa?? ...