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If A,B,C are acute positive angles such that A+B+C=Πand cot A cot B cot C=k,then a) k≤1/3√3 b) k≥1/3√3 c) k<1/9 d) k>1/3 The ans is a..... but please can ny 1 giv a proper method 4 dis.... ...

1. Any by wave equation which is of the form y = f (wt - kx ) represents a progressive wave : a. If the sign of t and x are opposite, wave is propagating along positive x-axis. b. If the sign of t and x is same , wave is prop ...

(xy)2N=M M>0 N is very large Integer ...

Show that for any number n, there are consecutive n composites that exist... This is not an olympiad question.... It is very much from the JEE syllabus.. Just that you have to think a bit.. (hint think of n!) ...

21-01-09 x21-01=y09 ...

integration a.secx + b.cosecx dx sinx + cosx limits 0 to pi/2 awkwardly enuf i am getting 0 [11] ...

how will u distinguish ethyl alcohol & propyl alcohol ...

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If the internal resistance of a cell is propotional to current drawn from cell.Then plot the variation of terminal potential difference of cell with current drawn from source. ...

*Image* Find eq. resistance b/w A and B ...

Q What is the solution for the differential equation ydx+(x+x2y)dy=0 ? ...

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Q1) Calculate the force on charge q1 in the fig. Given: q1=-1.0*10-6 C ;q2=3.0*10-6C ;q3=-2.0*10-6C ; d12=0.15m ;d13=0.10m and θ=30° *Image* ...

n cells each of emf E and identical resistance r are grouped into sets of cells connected in series.The (n/K) are then connected in parallel to a load resisance R.Then find max. power delivered. ...

Q Fig. shows three cases: in all the cases the circular part has radius R and straight ones are infinitely long for same I.The magnetic field in the three cases has the ratio? Fig follows......... ...

In any interference pattern, we get only dark and light bands. Why are we not getting bands of intermediate brightness? [7] ...

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what is the iso electric point of lysine? *Image* It is given that pKa1 = 2.18 pKa2 = 8.95 pKa3=10.53 ...

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Prove the following:(for a2<1) π a)∫ln(1-2acosθ+a2)dθ= 0 is a<1 & 2πlna if a>1 0 π b)∫ln(1-2acosθ+a2)cosnθdθ= -(π.an)/n 0 ...

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Two distinct, real, infinite GP each have a sum to infinite no of terms=1 and have common second term and of the series have 1/8 as their third term. If the second term of both the GPs can be written in the form ( m - n)/p wh ...

pls ans dis ques A man has to take 9 steps. he can move in 4 directions left, right, forward, backward. 1. in how many ways he can move 9 steps?? 2. in how many ways he can move 9 steps such that he has to take steps in all d ...

hiii...ma frndz...here m wid..... these r sum interisting information abt 'numbers'...jst watch out... d greatest no. one can make by 3 digit is 99^9 !! it can b shown dat dis no. has abt 369693100 digits.assuming there can b ...

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BY FIRST PRINCIPAL PLZ>......... cos-x2 cos-(e√tanx) ...

If 0∫x f(t)dt = x + x∫1 t f(t)dt , Find f(1). I am getting two answers for this!! Pls. try it & explain!! ...

THIS IS THE THREAD IN WHICH I AM POSTING ALL THOSE MATHS QUESTIONS OF WHICH I COULD NOT GET A CONVINCING SOLUTION BY MYSELF OR OTHERS AND I REQUEST ALL TARGETIITIANS TO HELP ME OUT SOME PROBLEMS MIGHT BE TOUGH SOME MIGHT BE V ...