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Recent questions tagged q26
Questions
$\cos 2^3\large\frac{\pi}{10}$$\cos 2^4\large\frac{\pi}{10}$$\cos 2^5\large\frac{\pi}{10}........$$\cos 2^{10}\large\frac{\pi}{10}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q26
trigonometric-identities
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
The velocity of small ball of mass M and density $d_1$ when dropped in a container filled with glycerin becomes constant after some time. If the density of glycerin is $d_2$ then force acting on the ball
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q26
medium
asked
Oct 4, 2013
by
meena.p
1
answer
Identify the correct pair of statements
jeemain
eamcet
biology
2013
q26
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
$\tan ^{-1}x +\tan ^{-1} y +\tan ^{-1} z= \large\frac{\pi}{2}$$=>1-xy-yz-zx=$
jeemain
eamcet
math
2010
q26
asked
Sep 26, 2013
by
meena.p
1
answer
If the coefficient of $r$th and $(r+1)$th terms in the expansion of $(3+7x)^{29}$ are equal , then $r=$
jeemain
eamcet
math
2011
q26
asked
Sep 20, 2013
by
meena.p
1
answer
$\cos ^{-1} \bigg(\large\frac{5}{13}\bigg)$$+\cos ^{-1} \bigg(\large\frac{3}{5}\bigg)$$=\cos ^{-1} x=>x=$
jeemain
eamcet
math
2013
q26
asked
Sep 14, 2013
by
meena.p
1
answer
The greatest negative integer satisfying $x^2-4x-77=0$ and $x^2 >4$ is ................... .
jeemain
eamcet
math
1991
fitb
q26
asked
Sep 13, 2013
by
meena.p
0
answers
Phosgene is formed when ................. is exposed to air and sun light.
jeemain
eamcet
chemistry
1991
fitb
q26
asked
Sep 12, 2013
by
meena.p
0
answers
When boron is added as impurity to silicon, the resulting material is ................. semiconductor.
jeemain
eamcet
physics
1991
fitb
q26
asked
Sep 11, 2013
by
meena.p
1
answer
What is the radius of moon's orbit around earth assuming the orbit to be circular ($g=9.8 m/s^2$; Radius of earth =6400 km; period of rotation of moon around the earth $=27.3\; days$
jeemain
physics
class11
unit6
gravitation
q26
medium
asked
Aug 20, 2013
by
meena.p
1
answer
In the arrangement shown mass m is released from rest with the spring unstretched . The force constant of spring is K. The maximum extension in the spring
jeemain
physics
class11
unit4
work-power-energy
q26
medium
asked
Jul 18, 2013
by
meena.p
1
answer
A disk of mass 10 gm is kept horizontaly in air by firing bullets of mass 5 g each. each at the rate of 10/s. If the bullet rebounds with which the bullets are fired is
jeemain
physics
class11
unit3
laws-of-motion
q26
medium
asked
Jul 8, 2013
by
meena.p
1
answer
The physical quantity not having the same dimensions are
jeemain
physics
class11
ch2
units-and-measurement
q26
easy
dimensional-formulae-and-analysis
asked
Jun 17, 2013
by
meena.p
1
answer
If the velocity of a particle moving along a straight line is directly proportional to the square of its distance from a fixed point on the line. Then its acceleration is proportional to
tnstate
class12
bookproblem
p231
objective
q26
sec-a
medium
asked
May 16, 2013
by
poojasapani_1
1
answer
The area of the parallelogram having a diagonal $\overrightarrow{3i}+\overrightarrow{j}-\overrightarrow{k}$ and a side $\overrightarrow{i}-\overrightarrow{3j}+\overrightarrow{4k} $ is
tnstate
class12
bookproblem
p266
objective
q26
modelpaper
jun-2008
oct-2009
mar-2010
asked
May 9, 2013
by
poojasapani_1
1
answer
In a hockey match,both teams A and B scored same number of goals up to the end of the game,so to decide the winner ,the referee asked both the captains to throw a die alternately and decided that the team,whose captain gets a six first,will be declared the winner.If the captain of team A was asked to start,find their respective probabilities of winning the match and state whether the decision of the referee was fair or not.
cbse
class12
modelpaper
2013
sec-c
q27
65-1
q24
65-2
q26
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Find the vector equation of the line passing through the point (1,2,3) and parallel to the planes $\overrightarrow{r}.(\hat{i}-\hat{j}+2\hat{k})=5$ and $\overrightarrow{r}.(3\hat{i}+\hat{j}+\hat{k})=6.$
cbse
class12
modelpaper
2013
sec-c
q26
q26-2
65-1
q23
q23-2
65-2
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Find the equation of the plane passing through the line of intersection of the planes $\overrightarrow{r}.(\hat{i}+3\hat{j})-6=0$ and $\overrightarrow{r}.(3\hat{i}-\hat{j}-4\hat{k})=0$,whose perpendicular distance from origin is unity.
cbse
class12
modelpaper
2013
sec-c
q26
q26-1
65-1
q23
q23-1
65-2
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Find the area of the greatest rectangle that can be inscribed in an ellipse $\Large \frac{x^2}{a^2}+\frac{y^2}{b^2}\normalsize = 1.$
cbse
class12
modelpaper
2013
sec-c
q23
q23-1
65-1
q26
q26-1
65-2
q27
q27-1
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Using matrices, solve the following system of equations : \[ 2x-3y+5z=11\] \[ 3x+2y-4z=-5\]\[x+y-2z=-3\]
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 15, 2013
by
thanvigandhi_1
1
answer
Solve the following differential equation : $\large\frac{dy}{dx}$$+y\cot\: x = x^2\cot x+2x $
cbse
class12
modelpaper
2012
sec-c
q26
medium
math
asked
Feb 11, 2013
by
thanvigandhi_1
1
answer
Evaluate : \[ \int_{-a}^a \sqrt{\frac{a-x}{a+x}}dx \]
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 10, 2013
by
thanvigandhi_1
1
answer
Show that the height of the cylinder of maximum volume that can be inscribed in a sphere of radius R is \( \frac{2R}{\sqrt 3} \). Find the volume of the largest cylinder inscribed in a sphere of radius R.
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 9, 2013
by
thanvigandhi_1
1
answer
Prove that the area of the right-angled triangle of given hypotenuse is maximum when the triangle is isosceles.
cbse
class12
modelpaper
2012
sec-c
q26
difficult
math
asked
Feb 9, 2013
by
thanvigandhi_1
1
answer
Find the area of the origin enclosed between the two curves \( (x-6)^2+y^2=36\: and \: x^2+y^2=36\)
cbse
class12
modelpaper
2012
sec-c
q26
medium
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Using integration find the area of the region bounded by the triangle whose vertices are (1,3)(2,5) and (3,4).
cbse
class12
modelpaper
2012
sec-c
q26
medium
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Solve the differential equation $ y.e^{\large\frac{x}{y}} dx=(x.e^{\large\frac{x}{y}}+y^2)dy ; y \neq 0$
cbse
class12
modelpaper
2012
sec-c
q26
medium
math
asked
Feb 7, 2013
by
thanvigandhi_1
1
answer
Obtain the inverse of the following matrix, using elementary operations $ A = \begin{bmatrix} 3 & 0 & -1 \\ 2 & 3 & 0 \\ 0 & 4 & 1 \end{bmatrix} $
cbse
class12
modelpaper
2012
sec-c
q23
2009
q26
ch3
medium
math
asked
Feb 6, 2013
by
thanvigandhi_1
1
answer
Evaluate : \( \int_1^4 (x^2-x)dx\) as a limit of sums.
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int_0^{\large\frac{\pi}{4}} \large\frac{sin\: x + cos \: x}{9+16 sin 2x}$$dx $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
If three distinct numbers are chosen at randomly from first 100 natural nos. then the probability that all of them are divisible by 2 or 3 is
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q26
p42
math
asked
Feb 5, 2013
by
meena.p
0
answers
If D, E & F are the mid-points of the sides of a triangle ABC, prove by vector method that area of \[\bigtriangleup DEF=\frac{1}{4}(area\;of\;\bigtriangleup ABC).\]
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q26
p36
math
asked
Feb 5, 2013
by
meena.p
0
answers
Stetch the graph of y = | x + 3 | and evaluate the area under the curve y = | x + 3 | above x - axis and between x = -6 to x = 0.
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int_0^{\large\frac{\pi}{2}} 2\sin x\cos x\tan^{-1}(\sin x)dx $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 4, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int_0^{\Large\frac{\pi}{2}}\large \frac{xsin\: x\cos x}{\sin^4x+cos^4x}$$dx $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 4, 2013
by
thanvigandhi_1
0
answers
Sketch the graph of $ f(x) = \left\{ \begin{array}{l l}|x-2|+2, & \quad { x \leq 2} \\ x^2-2, & \quad { x > 2} \end{array} \right. $ Evaluate \( \int_0^4 f(x) dx \) What does the value of this integral represent on the graph?
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 4, 2013
by
thanvigandhi_1
0
answers
Find the particular solution of the differential equation $(xdy-ydx)y.\sin \bigg(\large\frac{y}{x} \bigg)$$=(ydx+xdy)x \cos\large\frac{y}{x},$ given that \( y=\pi\) when $x = 3$.
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 3, 2013
by
thanvigandhi_1
0
answers
Evaluate: \[\int |\; x\; |dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q26
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
Solve the differential equation : $(x+y)dy + (x-y) dx=0$
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Feb 2, 2013
by
thanvigandhi_1
1
answer
A farmer has a supply of chemical fertilizer of type A which contains 10% nitrogen and 5% phosphoric acid, and type B which contains 6% nitrogen and 10% phosphoric acid. After testing the soil conditions of the field, it was found that atleast 14 kg of nitrogen and 14 kg of phosphoric acid is required for producing a good crop. The fertilizer of type A costs Rs.5 per kg and the type B costs Rs.3 per kg. How many kg of each type of the fertilizer should be used to meet the requirement at the minimum possible cost? Using L.P.P. solve the above problem graphically.
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 31, 2013
by
thanvigandhi_1
0
answers
Evaluate : $\int \large\frac{\tan \theta+\tan^3\theta}{1+\tan^3\theta}$$d\theta. $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 30, 2013
by
thanvigandhi_1
0
answers
Solve the differential equation : $ (x+y)\large\frac{dy}{dx}$$-2e^{-y}\: where \: x=0, \: when \: y=0. $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 30, 2013
by
thanvigandhi_1
0
answers
Solve the differential equation : $ (1+e^{\large\frac{x}{y}})dx+e^{\large\frac{x}{y}} \bigg( 1- \large\frac{x}{y} \bigg)$$ dy=0$
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 30, 2013
by
thanvigandhi_1
0
answers
Determine the points of maxima and minima of the function $ f(x)= \frac{1}{8}log x-bx+cx^2\; where\; b \geq 0$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q26
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Evaluate : $\int_0^{\pi} \cos 2x\log\sin\:x\: dx $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 28, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int \large\frac{\sin x}{\sin 4x}$$dx$
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 28, 2013
by
thanvigandhi_1
0
answers
Prove that $ \int_0^{\large\frac{\pi}{2}} ( \sqrt{\tan\:x}+ \sqrt{\cot\:x})dx= \sqrt2 \pi $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 27, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int_0^{\Large\frac{\pi}{4}} \large\frac{\sin x \: \cos x}{\cos^4x+sin^4x}$$dx $
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 26, 2013
by
thanvigandhi_1
0
answers
Find$ \Large\frac{dy}{dx}\;\normalsize when\;y=\sin ^{-1} \bigg[\Large\frac{5x+12 \sqrt{1-x^2}}{13}\bigg]$
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q26
p13
easy
math
sec-a
asked
Jan 25, 2013
by
meena.p
1
answer
Find the area of the circle \( 4x^2+4y^2\) which is interior to the parabola \( x^2=4y \).
cbse
class12
modelpaper
2012
sec-c
q26
math
asked
Jan 25, 2013
by
thanvigandhi_1
0
answers
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