Doubtnut
2,146 old videos with fewer than 5,000 views from this channel.
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3:31
Solution of which of the following represent rational numbers ? `x^2=5`
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3:31
`lim_(x- gt0)((seca x-secb x)/(x^2))`
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5:30
If `siny=(x^2)/(sqrt(a^4+x^4)),` then `(dy)/(dx)x=1=`
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5:32
The expression `((1+tan3 7^(@))(1+tan8^(@))(1+tan1 5^(@))(1+tan3 0^(@)))/((1+tan2^(@))(1+tan4
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3:17
If `(tan )A/2 =r`, then the value of `(sec A + tan A)` is equal to
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2:04
For `0 lt x lt pi,`the solution to the equation `((2+cosx)^(- 1))/((3+2/(2+cosx)))=2/19 isx=(
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4:38
If `x=tan t-t,y=sec t,` then `y^3y_2+(y_1)^4=`
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1:14
Find the product `(2)^(1/3). (2)^(1/4). (32)^(1/12)`
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3:02
The sum of the series `1/2x^2+2/3x^3+3/4x^4+4/5x^5+`... is :
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1:12
Find the roots of the quadratic equation `a^2b^2x^2+b^2x-a^2x-1=0`
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2:32
Number of values of `n in N` for which `n^4 + 4` is prime is
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4:05
Using the method of completing the square find roots of following quadratic equations.`(i) x^2
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3:12
If X is a point on the line `AB, Y and Z` are points outside such that `/_AXY = 45^@and /_YXZ
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3:29
`cot^-1x=tan^-1x` then -
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3:03
Let `cos^-1 (x/2)+cos^-1 (y/3)=theta` and denote by `f(x,y,theta)=0` the rational integeral ex
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2:29
The sum of the maximum and minimum values of the function `f(x)=sin^(-1) 4x+cos^(-1) 4x+sec^(-
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2:04
Points `M and N` are the mid points of sides `PA and PA of DeltaPAB. As P` moves along a line
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3:38
If `(2a-5)x^2-4x-15=0 and (3a-8)x^2-5x-21=0}` have equal root then
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2:30
If `sec^-1x=cosec^-1y`,then `cos^(- 1)(1/x)=cos^(- 1)(1/y)=`
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2:25
Let `f(x) =(x-1)^p.(x-2)^q where p gt 1, q gt 1.` Each critical point of `f(x)` is a point
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2:30
For the function `f(x)=xe^x,` the point
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7:12
A spherical balloon is being inflated so that itsvolume increases uniformly at the rate of `40
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5:18
Use differentials to obtain a resonable approximation to `(8. 01)^(4/3)+(8. 01)^2.`
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2:07
Consider the equation `(x^2 + x + 1)^2-(m-3)(x^2 + x + 1) +m=(1),` where `m` is a real parame