Recent questions tagged jeemain

If the vector $\overrightarrow{a} =2 \hat i+3 \hat j+6 \hat k$ and $\overrightarrow {b}$ are collinear and $|\overrightarrow {b}|=21,$ then $\overrightarrow {b}$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

A tower, of x meters high, has a flagstaff at its top. The tower and the flagstaff subtend equal angles at a point distant y meters from the foot of the tower. Then the length of the flagstaff(in meters), is :

asked Nov 12, 2013 by meena.p

1 answer

Two sides of a triangle are given by the roots of the equation $x^2-5x+6=0$ and the angle between the sides is $\large\frac{\pi}{3}$. Then the perimeter of the triangle is :

asked Nov 12, 2013 by meena.p

2 answers

In $\Delta ABC, \sum (b+c) \tan \large\frac{A}{2}$$ \tan \bigg(\large\frac{B-C}{2}\bigg)$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

In a $\Delta ABC, a (\cos ^2 B+\cos^2 C)+ \cos A(c \cos C+b \cos B)$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

$2 \tan h^{-1} \large\frac{1}{2}$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

$\sin^{-1} \large\frac{4}{5}$$+2 \tan ^{-1} \large\frac{1}{3}$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

If $\cos 2x =(\sqrt 2 +1) \bigg(\cos x - \large\frac{1}{\sqrt 2}\bigg), \cos x \neq \large\frac{1}{2}$ then $x \in :$

asked Nov 12, 2013 by meena.p

1 answer

$A+B=C=> \cos ^2 A +\cos ^2 B+\cos ^2 C- 2 \cos A \cos B \cos C $ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

If $A+C=2B$ then $\large\frac{\cos C- \cos A}{\sin A- \sin C}$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

If $ \large\frac{\tan 3A}{\tan A}$$=a$ then $\large\frac{\sin 3A}{\sin A}$ is equal to :

asked Nov 12, 2013 by meena.p

1 answer

The extreme values of $4 \cos (x^2) \cos \bigg( \large\frac{\pi}{3}$$+x^2\bigg) - \cos \bigg(\large\frac{\pi}{3}$$-x^2\bigg)$ over R, are :

asked Nov 12, 2013 by meena.p

1 answer

If $\cos \theta-4 \sin \theta=1$ then $\sin \theta+4 \cos \theta$ is equal to :

asked Nov 11, 2013 by meena.p

0 answers

Which one of the following statements related to protein synthesis are true ?

asked Nov 11, 2013 by thanvigandhi_1

0 answers

If $\alpha$ is a non-real root of $x^6=1$, then $\large\frac{\alpha ^5+ \alpha ^3+ \alpha +1}{\alpha ^2+1}$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

Study the following lists

asked Nov 11, 2013 by thanvigandhi_1

0 answers

Eight molecules of an enzyme solution is mixed with 1000 molecules of the substrate in a reaction mixture. If it converts 80% of the substrate into product in five minutes, then its turnover number is :

asked Nov 11, 2013 by thanvigandhi_1

0 answers

Assertion (A) : The energy requirement for the formation of one hexose molecule is more in Chlorella than in sugarcane. Reasons (R) : The formation of phosphoenol pyruvic acid from pyruvic acid requires two ATP molecules.

asked Nov 11, 2013 by thanvigandhi_1

1 answer

If $\alpha_1, \alpha_2, \alpha_3$ respectively denote the moduli of the complex number $-i, \large\frac{1}{3} $$ (1+i)$ and $-1+i$, then their increasing order is :

asked Nov 11, 2013 by meena.p

1 answer

If $A= \begin {bmatrix} -1 & 0 \\ 0 & 2 \end {bmatrix}$ then $A^3-A^2$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

adj $\begin {bmatrix} 1 & 0 & 2 \\ -1 & 1 &-2 \\ 0 & 2 & 1 \end {bmatrix}=\begin {bmatrix} 5 & a & -2 \\ 1 & 1 &0 \\ -2 & -2 & b \end {bmatrix}$ then $[a \quad b]$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

If $m [-3 \quad 4]+n [ 4 \quad -3]=[10 \quad -11]$ then $3m+7n$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

If $\alpha, \beta, \gamma$ are the roots of $x^3+2x^2-3x-1=0$, then $\alpha^{-2}+\beta^{-2}+\gamma^{-2}=$

asked Nov 11, 2013 by meena.p

1 answer

The roots of the equation $x^3-3x-2=0$ are :

asked Nov 11, 2013 by meena.p

1 answer

$E_1: a+b+c=0$, if 1 is a root of $ax^2+bx+c=0$ .$E_2:b^2-a^2=2ac,$ if $\sin \theta, \cos \theta$ are the roots of $ax^2+bx+c=0$ Which of the following is true?

asked Nov 11, 2013 by meena.p

1 answer

If x is real, then the minimum value of $\large\frac{x^2-x+1}{x^2+x+1}$, is :

asked Nov 11, 2013 by meena.p

1 answer

For non zero vectors $\overrightarrow a,\overrightarrow b\:and\:\overrightarrow c,\:\:if\:\:|(\overrightarrow a\times\overrightarrow b).\overrightarrow c|=|\overrightarrow a||\overrightarrow b||\overrightarrow c|$ then ?

asked Nov 11, 2013 by rvidyagovindarajan_1

1 answer

If $a,b,c$ are non negative and distinct numbers and vectors $a\hat i+a\hat j+c\hat k,\:\:\hat i+\hat k\:\:and\:\:c\hat i+c\hat j+b\hat k$ lie in a plane then c is ?

asked Nov 11, 2013 by rvidyagovindarajan_1

1 answer

Arrange the following respiratory substrates in decreasing order of $ CO_2 $ molecules released when one molecule of each of them is oxidized.

asked Nov 11, 2013 by thanvigandhi_1

0 answers

If $|a| < 1,b= \sum \limits_{k=1} ^{ \infty} \; \large\frac{a^k}{k}$ then a is equal to :

asked Nov 11, 2013 by meena.p

1 answer

The carbon ratio of lutein, abscisic acid and $ GA_{27}$ is :

asked Nov 11, 2013 by thanvigandhi_1

0 answers

$\sum \limits _{n=1}^{\infty} \large\frac{2n^2+n+1}{n !}$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

If $\large\frac{x^3}{(2x-1)(x+2)(x-3)}$$=A+\large\frac{B}{2x-1}+\frac{C}{x+2}+\frac{D}{x-3}$ then A is equal to :

asked Nov 11, 2013 by meena.p

1 answer

If $|x| < \large\frac{1}{2}$, then the coefficient of 'x' in the expansion of $\large\frac{1+2x}{(1-2x)^2}$ is :

asked Nov 11, 2013 by meena.p

1 answer

The coefficient of $x^3y^4z^5$ in the expansion of $(xy+yz+xz)^6$ is :

asked Nov 11, 2013 by meena.p

1 answer

If $(1+x)^{15}=a_0 +a_1 x +.....+ a_{15} x^{15},$ then $\sum \limits_{r=1}^{15} r \large\frac{a_r}{a_{r_1}}$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

Study the following lists

asked Nov 11, 2013 by thanvigandhi_1

0 answers

A three digit number n is such that the last two digits of it are equal and differ from the first. Then number of such n's is :

asked Nov 11, 2013 by meena.p

1 answer

The right sequence of carriers which involve in the transport of excess $Na^+$ ions out of the cell in salt resistant plants is :

asked Nov 11, 2013 by thanvigandhi_1

0 answers

$\{ n(n+1)(2n+1): n \in Z \} \in $

asked Nov 11, 2013 by meena.p

1 answer

Study the following table and identify the correct sequence of cells which shows the path of water movement between them :

asked Nov 11, 2013 by thanvigandhi_1

1 answer

If $a,bc \neq 0$ and belong to the set $\{0,1,2,3.......,9\},$ then $\log _{10} \bigg(\large \frac{a+10 b +10^2 c}{10^{-4} a +10^{-3}b +10^{-2} c}\bigg)$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

The disease caused by the virus having double stranded nucleic acid with ribose sugar as genetic material is :

asked Nov 11, 2013 by thanvigandhi_1

1 answer

Study the following combinations and identify correct matches :

asked Nov 11, 2013 by thanvigandhi_1

0 answers

$x=\large\frac{1}{2}$$ \bigg(\sqrt 3+\large\frac{1}{\sqrt 3} \bigg)$ then $\large\frac{\sqrt {x^2-1}}{x-\sqrt {x^2-1}}$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

If N denotes the set of all positive integers and if $f: N \to N$ is defined by $f(n) =$ the sum of positive divisors of n then, $f(2^k.3),$ where k is a positive integers, is :

asked Nov 11, 2013 by meena.p

1 answer

False statement related to Cycas is :

asked Nov 11, 2013 by thanvigandhi_1

0 answers

Study the following lists

asked Nov 11, 2013 by thanvigandhi_1

0 answers

Identify the correct sequence of the stages in the life cycle of Rhizopus after the reduction division of zygospore :

asked Nov 11, 2013 by thanvigandhi_1

1 answer

The function $f: C \to C$ defined by $f(x) =\large\frac{ax+b}{cx+d}$ for $ x \in C$ where $bd \neq 0$ reduces to a constant function , if :

asked Nov 11, 2013 by meena.p

1 answer

Ask Questions, Get Answers