Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
-
1:07
In the given figure ACB is a line, `/_DCA=5x` and `/_DCB=4x` Then find the value of `x`
-
5:30
If x is real, the expression ` (x+2)/(2x^2 + 3x+6)` takes all value in the interval
-
6:24
The locus of the foot of the perpendicular from the centre of the hyperbola `xy = c^2` on a v
-
6:44
The normal to the curve `x=a ( cos theta-thetasintheta), y = a( sintheta-theta costheta)` at a
-
3:21
If `P(AnnB)=1/4, P(barAnnbarB)=1/3` and `2P(A)=3P(B)=a` then `a=`
-
3:04
Consider the function `f(x) =(9^x)/(3+9^x)`. If the value of `f'(x) = kf' (1-x) `, then the va
-
3:13
The mid-point of the line segment joirning `(3, -1)` and `(1, 1)` is shifted by two units (in
-
2:38
The locus of the centre of the circle passing through the intersection of the circles `x^2+y^2
-
3:17
`PORS` is a parallelogram whose diagonals intersect at M. If `angleLPMS = 54^@, angleQSR=25^@
-
2:57
A line `x-y+1=0` cuts the y-axis at `A.` This line is rotated about `A` in the clockwise direc
-
2:44
If `P(B)=3/4, P(AnnBnnbarC)=1/3` and `P(barAnnBbarC)=1/3` then `P(BnnC)=`
-
7:12
If the sum of slopes of concurrent normals to the curve xy = 4 is equal to the sum of ordinate
-
6:34
Let `L=lim_(x- gtoo){((x+1)/(x-1))^x-e^2)} x^2,` then the value of `(9L)/(2e^2)` is equal l
-
3:27
Let `A ans B` be any two events with positive probabilities Statement I `P(E / A)geqP(A / E
-
2:31
`int1/(sin^2x.cosx)dx`
-
3:41
The value of `lim sum_(k=1)^n (n-k)/n cos((4k)/n)` equals to
-
4:33
If `l_1=int_0^1(1+x^8)/(1+x^4)dx and l_2=int_0^1 (1+x^9)/(1+x^3)dx` then
-
1:27
if `g(x^3+1)=x^6+x^3+2` then the value of `g(x^2-1)` is
-
3:53
`int_0^oo[3/(x^2+1)]dx,` where `[.]` denotes the greatest integer function, is equal to
-
4:59
An observer at an anti air craft post A identifies an enemy aircraft due East of his post at a
-
6:25
An isosceles triangle of wood is placed in a vertical plane, vertex upwards, and faces the sun
-
2:23
If `alpha + beta = 90^@` and `beta + gamma = alpha` then `tanalpha-tanbeta=?`
-
3:59
Prove that `int_0^x [x]dx=x[x]-1/2[x] ([x]+1)`
-
3:48
Prove that `1/(n !)+1/(2!(n-2)!)+1/(4!(n-4)!)+...=1/(n !)2^(n-1)`