Doubtnut
581 old videos with fewer than 5,000 views from this channel.
-
4:46
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `z=i log(2-sqrt3),t h e ncosz=`
`-1`
b. `-1//...
-
3:00
IIT JEE CONIC SECTIONS ABCD is a rectangle. A circle passing through vertex C touches the sides A...
-
6:10
IIT JEE VECTOR ALGEBRA The position vectors of the
vertices `A ,B ,a n dC`
of a triangle are ` ...
-
4:20
IIT JEE VECTOR ALGEBRA If ` vec aa n d vec b`
are two unit vectors and `theta`
is the angle betwe...
-
3:28
If `3sin(x y)+4cos(x y)=5` then `dy/dx=`
-
3:22
IIT JEE CONTINUITY AND DIFFERENTIABILITY Let `f: R->R`
be any function. Also `g: R->R`
i...
-
1:35
Factorize each of the following expressions : `4a^2-9b^2-2a-3b`
-
2:46
JEE MAINS 2018 JEE MAINS 2018 Number of roots of the equation `2sqrt(2x+1)=2x-1`
is
0 (b) 1
(...
-
6:46
JEE MAINS 2018 JEE MAINS 2018 If `(0,1),(1,1)a n d(1,0)`
be the middle points of the sides of a ...
-
2:12
JEE MAINS 2018 JEE MAINS 2018 If `f(x),g(x),h(x)`
are polynomials in `x`
of degree `2`
and `F(x)...
-
2:33
JEE MAINS 2018 If `A=[1 2 0-1 1 2 2-1 1],t h e ndet(A d j(A d jA))=`
13 (b) `13^2`
(c) `13^4`
...
-
2:57
JEE MAINS 2018 For hyperbola `x^2sec^2alpha-ycos e c^2alpha=1,`
which of the following remains c...
-
6:12
JEE MAINS 2018 If `L_1&L_2`
are the lengths of the segments of any focal chord of the parabola `...
-
2:42
JEE MAINS 2018 JEE MAINS 2018 The point P on the ellipse `4x^2+9y^2=36`
is such that the are of ...
-
2:28
JEE MAINS 2018 JEE MAINS 2018 Let `a_n`
be the `n^(t h)`
term of an A.P. If
`sum_(r=1)^(100)a_(...
-
6:25
JEE MAINS 2018 JEE MAINS 2018 The number of terms of an A.P. is even; the sum of the odd terms i...
-
3:44
JEE MAINS 2018 A straight highway leads to the foot of a tower. A man standing at the
top of ...
-
4:43
JEE MAINS 2018 If for all real numbers `y ,[y]`
is the greatest integer less than or equal to `y...
-
1:23
JEE MAINS 2018 If by dropping a stone in a quiet lake a wave moves in circle at a
speed of 3....
-
7:31
JEE MAINS 2018 Area of figure represented by `|x|+|y| lt=3 and y^2 lt= 4x`
is
`4/3`
b. `8/...
-
2:02
JEE MAINS 2018 If the ratio of the
roots of the equation, `x^2+alphax+alpha+2=0`
is equal to ...
-
1:48
JEE MAINS 2018 If `f(x)=a+b x+c x^2AAa ,b ,c in R`
and `a ,b ,c`
are distinct, then value of `|...
-
3:45
CBSE Class 10 Boards Maths Prove that the sum of opposite pair of angles of a cyclic quadrilater...
-
8:21
JEE MAINS 2018 Differentiate ltmath gt
ltmrow gt
ltmsup gt
ltmrow gt
ltmi gtcos lt/mi gt lt...