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Recent questions in CBSE XI
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CBSE XI
CBSE XI
Math
Physics
Chemistry
Biology
Express $\;(5-3i)^{3}\;$ in the form of $\;a+ib$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the degree measures corresponding to the following radian measures :-$\large\frac{5\pi}{3}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q2-iii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Express the following in the form of $\;a+bi : (-i) \; (2i)\;(-\large\frac{1}{8}i)^{3}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the degree measures corresponding to the following radian measures:-$-4$ radians
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q2-ii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Express the following in the form of $\;a+bi : (-5i) \; (\large\frac{1}{8}i)$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the degree measures corresponding to the following radian measures :-$\large\frac{11}{16}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q2-i
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
If $\;4x+i(3x-y)=3+i (-6)\;$ where x and y are real numbers , then find the values of x and y
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the radian measures corresponding to the following degree measures :-$520^{\large\circ}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q1-iv
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $(x + \sec x)(x-\tan x)$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q29
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
Find the radian measure corresponding to the following degree measure :-$240^{\large\circ}$
sat
trigonometry
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q1-iii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the radian measures corresponding to the following degree measures :-$-47^{\large\circ}30'$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q1-ii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $\large\frac{x}{1+\tan x}$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q28
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
Find the radian measures corresponding to the following degree measures :-$25^{\large\circ}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q1-i
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $\large\frac{x^2 \cos \bigg( \Large\frac{\pi}{4}\bigg)}{\sin x}$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q27
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
If the equation $ax^2+bx+c=0$ $(a > 0)$ has roots $\alpha$ and $\beta$ such that $ \alpha < -2$ and $\beta > 2$ then,
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Sum of rational roots of $x^5=\large\frac{133x-78}{133-78x}$ is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $\large\frac{4x+5 \sin x}{3x+7 \cos x}$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q26
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
Sum of all integral roots of $(\log_5x)^2+\log_{5x}(\large\frac{5}{x})$$=1$ is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Given $x+y+z=4$ and $x^2+y^2+z^2=6$.The range of z is $[\large\frac{2}{3}$$,k]$.The value of k is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Given,for three distinct real numbers a,b,c $\in R,a(a^2+p)=b(b^2+p)=c(c^2+p)$.The value of $a+b+c$ is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $(x+\cos x)(x-\tan x)$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q25
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
The least integral value of m for which every solution of inequality $1 \leq x\leq 2$ is solution of the inequality $x^2-mx+1 < 0$
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Number of polynomials p(x) with integral coefficients satisfying the condition p(1)=2 and p(3)=1 are
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
The real value of a for which the roots $x_1,x_2,x_3$ of $x^3-6x^2+ax-a=0$ satisfy $(x_1-3)^3+(x_2-3)^3+(x_3-3)^3=0$ is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Number of solution of $2\cos^2(\large\frac{x}{2})=$$(0.2)^x+(0.2)^{-x}$ are
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
$a$ and $b$ are two integers such that $10a+b=5$ and $p(x)=x^2+ax+b$.The value of n such that $p(10)p(11)=p(n)$
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Given $a,b,c > 0,a^2=bc$ and $a+b+c=abc$,the least possible value of $a^2$ is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
If $x_1$ and $x_2$ are roots of the equation $x^2+x+c=0\quad c\neq 0$ and $\large\frac{x_1^3}{2+x_2}+\frac{x_2^3}{2+x_1}=\frac{-1}{2}$ the value of -4c is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Let $a,b$ be two distinct roots of $x^4+x^3-1=0$ and $p(x)=x^6+x^4+x^3-x^2-1$
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Let $f(x)=x^3+3x^2+6x+2009$ and $g(x)=\large\frac{1}{x-f(1)}+\frac{2}{x-f(2)}+\frac{3}{x-f(3)}$.The no of real solutions of $g(x)$=0 is :
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 16, 2014
by
sreemathi.v
1
answer
If $\;(\large\frac{1+i}{1-i})^{m}=1\;$ then find the least positive integral value of m
math
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
difficult
sec-c
asked
Apr 15, 2014
by
yamini.v
1
answer
Find the number of non - zero integral solutions of the equation $\;|1-i|^{x}=2^{x}$
math
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
difficult
sec-c
asked
Apr 15, 2014
by
yamini.v
1
answer
Name the octant in which the point $(-3,-1,6)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-7
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the octant in which the point $(-4,2,5)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-6
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the octant in which the point $(-4,2,-5)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-5
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the octant in which the point $(4,2,-5)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-4
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the octant in which the point $(4,-2,-5)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-3
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the octant in which the point $(4,-2,3)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-2
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
Name the Octant in which the point $(1,2,3)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-1
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
A point is is $XZ$ plane. What can you say about its $y$ coordinate?
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q2
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
A point is on $x-axis$. What are its $y-coordinate $ and $z-coordinate?$
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q1
asked
Apr 15, 2014
by
rvidyagovindarajan_1
1
answer
If $\cot\theta,cosec \theta$ are the roots of the equation $ax^2+bx+c=0$ and $\Delta=b^2-4ac$,then $a^4$ equals
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
If $\;\alpha\;$ and $\;\beta\;$ are different complex numbers with $\;|\beta=1|\;$ , then find $\;|\large\frac{\beta-\alpha}{1-\overline{\alpha} \beta}|$
math
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
difficult
sec-c
asked
Apr 15, 2014
by
yamini.v
1
answer
If $\;(x+iy)^{3}=u+iv\;$ , then show that $\; \large\frac{u}{x} + \large\frac{v}{y} = 4(x^{2}-y^{2})$
math
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
difficult
sec-c
asked
Apr 15, 2014
by
yamini.v
1
answer
Find the modulus of $\;\large\frac{1+i}{1-i} - \large\frac{1-i}{1+i}$
math
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
easy
sec-a
asked
Apr 15, 2014
by
yamini.v
1
answer
The set of values of b for which $2\log_{1/36}(bx+28)=-\log_6(12-4x-x^2)$ has exactky one solution is
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
Number of irrational roots of the equation $(x^2-3x+1)(x^2+3x+2)(x^2-9x+20)=-30$ are
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
The number of irrational solutions of $\sqrt{x^2+\sqrt{x^2+11}}+\sqrt{x^2-\sqrt{x^2+11}}=4$ are
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
The set of all values of 'a' for which the roots of the equation $(1+a)x^2-3ax+4a=0$ exceeds 1
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
Given $\alpha,\beta,\gamma$ such that $\alpha+\beta+\gamma=2,\alpha^2+\beta^2+\gamma^2=6,\alpha^3+\beta^3+\gamma^3=8$,then the value of $\alpha^4+\beta^4+\gamma^4$ is equal to
jeemain
math
class11
complex-numbers-and-quadratic-equations
ch5
difficult
asked
Apr 15, 2014
by
sreemathi.v
1
answer
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