Recently Active Mathematics Questions

If 3pi/4<A<pi then 2cotA+cosec2A is equal to ??? ...

LET \left(a_{in} \right)_{n\geq 1} i\epsilon \left\{1,2,3,.,p \right\} sequences of strictly real pozitive numbers. Prove that: ( \sum_{k=1}^{n} \frac{1}{ \prod_{i=1}^{p} a_{ik} } ) ( \sum_{k=1}^{n}( \sum_{i=1}^{p} a_{ik} )^{ ...

Locus of reflection of the foci of the ellipse x2/16+y2/12=1 in its tangents are the curves C1 and C2 .Curve C1 and C2 meet at P and Q.Let the line passing through P and Q be L.Hyperbola H is drawn with P and Q as its foci an ...

x^{2}-y^{2}-4x-2y+2=0 represents a] a pair of straight lines b] ellipse c]hyperbola centred at(2,-1) d]circle centred at(2,1) ...

Which one of the following is true? (a) log(x+ y) = logx + logy (b) log xy = logx logy (c) log x / y = log x / log y (d) None of these ...

in [0,1] , x^{2}(1-x)^{6} attains maximum value at which point? ...

if z=x^{2}y +3xy^{4} and x=sin2t \; , y=cost find \frac{dz}{dt}\; at \; t=0 ...

A traffic light is green for 30 seconds, then red for 30 seconds, then green for 30 seconds and so on. What is your expected delay? ...

\lim_{n->infinity} \frac{1}{2n}[log(2nCn)] ...

What is common tangent,(if any) for the curves y2 =8x and x2/4 +y2/9 =1? How do u approach such problems in general? ...

Hey can anyone pls tell me somethin about normal and poissons distributions ........just some basic stuff cause i cant find anything about them... ...

Two planes I and II bomb a target in succession. The probabilities of I and II scoring a hit correctly are 0.3 and 0.2, respectively. The second plane will bomb only if the first misses the target. The probability that the ta ...

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if a(x) is the solution of \frac{dz}{dx}-\frac{2}{x}z=\frac{2}{3}x^{4} and z(1)=2/9. then find the value of z(-1) ...

if x^{2}-2xcos\theta +1=0 find the value of x^{n}(2cosn\theta -x^{n}) where n is a natural number ...

ax+by+ c can be a normal to xy=1 if a] a>0 , b<0 b]a<0 , b>0 c] a and b are of opposite signs d] a=0 , b=0 ...

\huge THIS\; ONE\; I \; DID\; NOT \; GET \huge FIND THE PARTICULAR INTEGRAL OF y^{''}-y^{'}-2y=sin3x ...

if e and d are the eccentricities of a hyperbola and its conjugate hyperbola , then \frac{1}{e^{2}}+\frac{1}{d^{2}}=? ...

I=\int_{0}^{\frac{\pi }{2}}{\frac{(acosx+bsinx)}{sinx+cosx}} find the value of I ...

if p and q be the perpendiculars from the angular points A and B on any line passing through the vertex C of the triangle ABC, then prove that a2p2+ b2q2 - 2abpq cos C = a2b2 Sin2 C ...

if f(x)=\int_{0}^{x}{e^{-t^{2}}t^{3}}dt find f(1) ...

f(x)=5x^{3}-30x^{2}-75x+3 find the interval to which x belongs such that f(x) is decreasing for all real x. ...

if -1<x<0 den sin-1 x =? a dice is rolled 4 times d probability of getting a larger no dan d previous no each time is? ...

........................................................................................... Nice name but actually i have a question .. Three circles touch each other externally. The tangents at the points of contact meet at ...

ok optimus i hav made this thread where u n others can post the method of graphical approach for coordinate ...

1] n_{C_{4}} \;, n_{C_{5}} ,n_{C_{6}} are in AP. find the value of n ...

Find all the solutions of sin5x+cos3x=1 ...

\lim_{n\rightarrow infinity } n_{C_{x}}\left(\frac{m}{n} \right)^{x}\left(1-\frac{m}{n} \right)^{n-x} ...

What is the maximum value of 1/2x + 1/21/x for x > 0? ...

Find all integers 'a' such that (x - a)(x - 12) + 2 can b factored as (x + b)(x + c) where 'b' and 'c' are integers. ...