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Recent questions tagged q22
Questions
A ray of light passing through the point (1, 2) reflects on the $x$ - axis at point $A$ and the reflected ray passes through the point (5, 3). Find the coordinates of $A$
cbse
class11
ch10
straight-lines
bookproblem
misc
sec-c
q22
difficult
asked
May 23, 2014
by
thanvigandhi_1
1
answer
Prove that, $ \sin \theta + \sin 2\theta + \sin 3\theta+...+ \sin n\theta = \large\frac{\Large\frac{\sin n \theta}{2} \sin \Large\frac{(n+1)}{2} \theta}{\sin \Large\frac{\theta}{2}}$, for all $ n \in N$ by using principle of mathematical induction.
cbse
class11
ch4
mathematical-induction
exemplar
q22
asked
May 6, 2014
by
thanvigandhi_1
0
answers
Prove the following by using the principle of mathematical induction for all $n \in N$ \[\] $ 3^{2n+2}-8n-9$ is divisible by 8.
cbse
class11
ch4
mathematical-induction
bookproblem
sec3
exercise-4.1
q22
asked
May 1, 2014
by
thanvigandhi_1
1
answer
Find the value of the expression :$3[\sin^4(\large\frac{3\pi}{2}-\normalsize\alpha)+\sin^4(3\pi+\alpha)]-2[\sin^6(\large\frac{\pi}{2}+\normalsize \alpha)+\sin^6(5\pi-\alpha)]$
cbse
math
class11
ch3
trigonometric-functions
exemplar
q22
sec-c
difficult
asked
Apr 20, 2014
by
sreemathi.v
1
answer
Prove : $\cot x\cot 2x-\cot 2x\cot 3x-\cot 3x.\cot x$=1
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q22
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 ) $x^4(5 \sin x-3 \cos x)$
math
cbse
class11
ch13
limits-and-derivatives
bookproblem
misc
p317-318
q22
asked
Apr 14, 2014
by
thanvigandhi_1
1
answer
There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_1$ and $d_2$ are filled int hetube. Each liquid subtends $90^{\circ}$ angle at centre. Radius joining there interface makes an angle $\alpha$ with vertical. Ratio $\large\frac{d_1}{d_2}$ is
jeemain
jeemain-2014
physics
q22
medium
asked
Apr 7, 2014
by
meena.p
1
answer
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