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Recent questions in CBSE XI
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CBSE XI
CBSE XI
Math
Physics
Chemistry
Biology
Prove :$\large\frac{\tan(\Large\frac{\pi}{4}\normalsize +x)}{\tan(\Large\frac{\pi}{4}\normalsize -x)}=\big(\large\frac{1+\tan x}{1-\tan x}\big)^2$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q7
sec-c
difficult
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Prove : $\cos(\large\frac{\pi}{4}$$-x)\cos (\large\frac{\pi}{4}$$-y)-\sin(\large\frac{\pi}{4}$$-x)\sin (\large\frac{\pi}{4}$$-y)=\sin (x+y)$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q6
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the value : $\tan 15^{\large\circ}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q5-ii
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the value :$\sin 75^{\large\circ}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q5-i
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Prove : $2\sin ^2\large\frac{3\pi}{4}$$+2\cos^2\large\frac{\pi}{4}$$+2\sec^2\large\frac{\pi}{3}$$=10$
sat
trigonometry
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q4
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Prove : $\cot^2\large\frac{\pi}{6}$$+cosec \large\frac{5\pi}{6}$$+3\tan^2\large\frac{\pi}{6}$$=6$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q3
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Prove : $2\sin^2\large\frac{\pi}{6}+$$cosec ^2\large\frac{7\pi}{6}$$\cos^2\large\frac{\pi}{3}=\large\frac{3}{2}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q2
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Prove : $\sin^2\large\frac{\pi}{6}$$+\cos^2\large\frac{\pi}{3}$$-\tan^2\large\frac{\pi}{4}=-\frac{1}{2}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q1
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the value of the trigonometric function $\cot(\large\frac{-15\pi}{4})$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q10
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the values of the trigonometric function $\sin(-\large\frac{11\pi}{3})$
sat
trigonometry
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q9
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the values of the trigonometric function $\tan \large\frac{19\pi}{3}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q8
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the value of the trigonometric functions $cosec (-1410^{\large\circ})$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q7
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the value of the trigonometric function $\sin 765^{\large\circ}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q6
sec-a
easy
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Find the values of other five trignometric function $\tan x=\large\frac{-5}{12}$,$x$ lies in the second quadrant
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q5
sec-b
medium
asked
Apr 17, 2014
by
sreemathi.v
1
answer
Convert the complex number $\;z=\large\frac{i-1}{cos \large\frac{\pi}{3} + i sin \large\frac{\pi}{3}}\;$ in the polar form
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find real $\;\theta\;$ such that $\;\large\frac{3 +2i sin \theta}{1-2isin\theta}\;$ is purely real .
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
If $\;x+iy = \large\frac{a+ib}{a-ib}\;$, prove that $\;x^{2} + y^{2} =1$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the modulus and argument of the complex number $\; \large\frac{1}{1+i}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the modulus and argument of the complex number $\; \large\frac{1+i}{1-i}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the conjugate of $\;\large\frac{(3-2i)(2+3i)}{(1+2i)(2-i)}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-misc
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the distance between the points $(-1,3,-4)$ and $(1,-3,-4)$
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-2
sec-a
easy
q1-3
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Find the distance between the the points $(2,-1,3)$ and $(-2,1,3)$.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-2
sec-a
easy
q1-4
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Find the distance between the points $(-3,7,2)$ and $(2,4,-1)$
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-2
sec-a
easy
q1-2
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Find the distance between the points $(2,3,5)$ and $(4,3,1)$
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-2
sec-a
easy
q1-1
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Solve $\; \sqrt{5} x^{2} + x + \sqrt{5}=0 $
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-6
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Coordinate planes divide the space into how many octants?
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q4-3
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
The coordinates of a point in the $xy$ plane are of the form ?
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q4-2
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Solve $\;x^{2} + x + 1=0 $
sat
math
trigonometry
cbse
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-6
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
The $x-$ axis and $y-$ axis taken together determine a plane known as ?
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q4-1
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Solve $\;x^{2}+2 =0 \;$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-6
exemplar
asked
Apr 16, 2014
by
yamini.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 ) $\large\frac{x}{\sin^nx}$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q30
asked
Apr 16, 2014
by
thanvigandhi_1
1
answer
Name the octant in which the point $(2,-4,-7)$ lies.
cbse
class11
ch12
introduction-to-3d-geometry
bookproblem
exercise12-1
sec-a
easy
q3-8
asked
Apr 16, 2014
by
rvidyagovindarajan_1
1
answer
Find the values of other five trignometric function $\sec x=\large\frac{13}{5}$,$x$ lies in the fourth quadrant
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q4
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Convert the complex number $\;\large\frac{-16}{1+i \sqrt{3}} \;$ into polar form
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-5
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Represents the complex number $\;z=1+ \sqrt{3} i \;$ in the polar form
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-5
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the values of other five trignometric function $\cot x=\large\frac{3}{4}$,$x$ lies in the third quadrant
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q3
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Express the following in the form $\;a+ib : i^{-35}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-4
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the values of other five trignometric function $\sin x=\large\frac{3}{5}$,$x$ lies in the second quadrant
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q2
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Express the following in the form $\;a+ib : \large\frac{5 + \sqrt{2} i }{1 - \sqrt{2} i}$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exercise5-4
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
Find the values of other five trignometric function $\cos x=-\large\frac{1}{2}$,$x$ lies in the third quadrant
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-2
q1
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 21cm
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q7-iii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 15cm
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q7-ii
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 10cm
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q7-i
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
If in two circles arcs of the same length subtend angles $60^{\large\circ}$ and $75^{\large\circ}$ at the centre,find the ratio of their radii
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q6
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
In a circle of diameter 40cm,the length of a chord is 20cm.Find the length of the minor arc of the chord
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q5
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the degree measures of the angle subtended at the centre of a circle of radius 100cm by an arc of length 22cm (use $\pi=\large\frac{22}{7})$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q4
sec-b
medium
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Find the multiplicative inverse of $\;2 - 3 i$
cbse
math
class11
ch5
complex-numbers-and-quadratic-equations
exemplar
asked
Apr 16, 2014
by
yamini.v
1
answer
A wheel makes 360 revolutions in one minute.Through how many radians does it turn in one second?
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q3
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
Express $\;(- \sqrt{3} + \sqrt{-2})(2 \sqrt{3} - i)\;$ in the form $\;a+ib$
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 :- $\large\frac{7\pi}{6}$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-1
q2-iv
sec-a
easy
asked
Apr 16, 2014
by
sreemathi.v
1
answer
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