Doubtnut
1,097 old videos with fewer than 5,000 views from this channel.
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9:07
If `alphasin^2x+betacos^2x=1,betasin^2y+alphacos^2y=n` and `alphatanx=betatany` , then `(alpha^...
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7:08
Statement 1: `lim x - gt0 ((sqrt(1-cos2x)) logcosx)/x^2` does not exist.
Statement 2: `|sinx| ...
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3:26
Consider the function `f(x)= e^x and g(x)=sin^-1 x`, then which of the following is/are neces...
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7:58
If `k = |x-1| + |x-2| + |x-3| + |x-4|`, then minimum integral value of k for which the above e...
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3:17
Match column-1 (in which argand diagram is given) with column-II (in which corresponding locus ...
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3:18
If `a = cosalpha + isinalpha, b = e^(i beta), c=cis theta and (ab)/c=1`, then find the value of...
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2:22
find the equation of a straight line parallel to `2x + 3y + 11 = 0` and which is such that the ...
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7:18
let `g(x)=x^c e^(cx) and f(x)=int_0^x t e^(2t)(1+3t^2)^(1/2)dt`. if `L=lim_(x- gtoo) (f'(x))/...
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3:06
The distance from the foci of `P (a, b)` on the ellipse `x^2/9+y^2/25=1` are
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14:14
Determine the nature of the quadrilateral formed by four lines `3x+4y -5=0, 4x-3y-5=0; 3x + 4...
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2:30
No. of ways of dividing `80` cards into `5` equal groups of `16` each is:
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3:51
he number of n on negative integral solutions to the system ofequations `a_1 + a_2 + a_3 + a_4...
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2:58
Number of un-order pair solution of `(x, y)` ofthe equation `1/x+1/y= 1/2007` ,where `x, y in ...
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4:27
Let `f(x)=sin^6x+cos^6x` then
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2:19
Given `f(x)=ax+b` and `f(f(f(x)))=27x+13` where `a` and `b` are real numbers then
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3:08
`int (dx)/(sin(x-a)sin(x-b)`
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3:55
If the middle term of `(1+x)^(2n)` is the greatest term, then x lies between
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2:32
In how many ways four friends can put up in 8 hotels of a town if (i) There is no restriction? ...
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1:59
Let `f(x)=x^2-x+ 5,x gt 1/2 and g(x)` is its inverse function, then `g'(7)` equals
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5:39
`(1/{sec^2 alpha-cos^2 alpha}+1/{cosec^2 alpha-sin^2 alpha})cos^2 alpha*sin^2 alpha=(1-cos^2alp...
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5:50
Number of solutions of the trigonometric equation `cos^2( pi/4(cosx + sinx))- tan^2( x + pi/4t...
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3:43
Given that `sum_(n=1)^oo 1/n^2=pi^2/6 and sum_(n=1)^oo 1/(n^2+8n+16)=pi^2/a-b` where a in `N ...
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12:52
The sum of coord inates of a point inside the triangle which is situated at equal distance from...
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2:44
Find the range of each of the following `f(x) = ln (sin^-1 x)`