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Recent questions tagged q21
Questions
Find equation of the line which is equidistant from parallel lines $9x + 6y – 7 = 0$ and $3x + 2y + 6 = 0.$
cbse
class11
ch10
straight-lines
bookproblem
misc
sec-c
q21
difficult
asked
May 23, 2014
by
thanvigandhi_1
1
answer
$18$ mice were placed in two experimental groups and one control group,with all groups equally large.In how many ways can the mice be placed into three groups?
cbse
math
class11
ch7
permutations-and-combinations
exercise7-3
exemplar
q21
sec-b
medium
asked
May 15, 2014
by
sreemathi.v
1
answer
Prove that, $ \cos \theta, \cos 2\theta \cos 2^2\theta....\cos 2^{n-1} \theta = \large\frac{\sin 2^n \theta}{2^n \sin \theta}$, for all $n \in N$ by using the principle of mathematical induction.
cbse
class11
ch4
mathematical-induction
exemplar
q21
asked
May 6, 2014
by
thanvigandhi_1
0
answers
Prove the following by using the principle of mathematical induction for all $n \in N$ \[\] $ x^{2n}-y^{2n}$ is divisible by $x+y$.
cbse
class11
ch4
mathematical-induction
bookproblem
sec3
exercise-4.1
q21
asked
May 1, 2014
by
thanvigandhi_1
1
answer
If $\cos(\theta+\phi)=m\cos(\theta-\phi)$ then prove that $\tan\theta=\large\frac{1-m}{1+m}$$\cot\phi$
cbse
math
class11
ch3
trigonometric-functions
exemplar
q21
sec-c
difficult
asked
Apr 20, 2014
by
sreemathi.v
1
answer
Prove $\large\frac{\cos 4x+\cos 3x+\cos 2x}{\sin 4x+\sin 3x+\sin 2x}$$=\cot 3x$
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q21
sec-b
medium
asked
Apr 17, 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 ) $\large\frac{\sin (x+a)}{ \cos x}$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q21
asked
Apr 14, 2014
by
thanvigandhi_1
1
answer
A pipe of length $85\;cm$ is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below $1250\; Hz$. The velocity of sound in air is $340\; m/s$.
jeemain
jeemain-2014
physics
q21
medium
asked
Apr 7, 2014
by
meena.p
1
answer
Evaluate the given limit $ \lim\limits_{ x \to 0} ( \text{cosec} \: x - \cot\: x)$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
limits
exercise13-1
p301-303
q21
asked
Apr 5, 2014
by
thanvigandhi_1
1
answer
Niacin is vitamin
jeemain
aipmt
chemistry
biomolecules
organic-chemistry
cbse
class12
unit16
easy
q21
asked
Mar 27, 2014
by
thanvigandhi_1
1
answer
The number of isomeric forms that are represented by the aromatic compound $C_7H_9N$ is
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q21
medium
asked
Mar 22, 2014
by
thanvigandhi_1
1
answer
Zinc reacts with very dilute nitric acid to produce.
jeemain
cbse
chemistry
class12
unit6
general-principals-and-processes-of-isolation-of-metals
q21
medium
asked
Mar 17, 2014
by
meena.p
1
answer
What is correct about the expression -$ P \Delta V$?
jeemain
physics
thermodynamics
cbse
class11
class12
q21
easy
asked
Mar 15, 2014
by
thanvigandhi_1
1
answer
Which of the following is the correct order for the strength of hydrogen bonds
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
hydrogen-bonding
q21
difficult
asked
Mar 10, 2014
by
sreemathi.v
1
answer
Nylon-6 is made from
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry
polymers
q21
easy
asked
Mar 6, 2014
by
thanvigandhi_1
1
answer
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