Doubtnut
581 old videos with fewer than 5,000 views from this channel.
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3:53
IIT JEE INTEGRALS `int_(-1)^2[([x])/(1+x^2)]dx ,w h e r e[dot]`
denotes the greater integer funct...
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1:49
IIT JEE MATRICES Statement 1: `A=[4 0 4 2 2 2 1 2 1]B^(-1)=[1 3 3 1 4 3 1 3 4]`
. Then `(A B)^(-1...
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2:57
The sum of two angles of a triangle is `80^0` and their difference is `20^0` . Find all the angles.
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4:09
The sum of two positive quantities is equal to `2ndot`
the probability that their product is no...
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1:05
Find the principal values of each of the following: `tan^(-1){sin(-pi/2)}` (ii) `tan^(-1){cos(3p...
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2:53
IIT JEE INTEGRALS `Iff(x)=Asin((pix)/2)+b ,f^(prime)(1/2)=sqrt(2)a n d`
`int_0^1f(x)dx=(2A)/pi,t...
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3:12
Given three non-zero,
non-coplanar vectors ` vec a , vec b ,a n d vec cdot vec r_1=p vec a+q...
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2:41
IIT JEE PROBABILITY Statement 1: If `P(A)=0. 25 ,P(B)=0. 50 ,a n dP(AnnB)=0. 14`
, then the prob...
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2:29
IIT JEE VECTOR ALGEBRA Find `| vec axx vec b|`
, if ` vec a= hat i-7 hat j+7 hat ka n d vec b=3 h...
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2:11
IIT JEE STRAIGHT LINES If lines `x+2y-1=0,a x+y+3=0,`
and `b x-y+2=0`
are concurrent, and `S`
...
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5:31
IIT JEE APPLICATION OF INTEGRALS Which of the following have the same bounded area
`f(x)=s in x ...
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9:00
IIT JEE CONIC SECTIONS `y^2+2y-x+5=0`
represents a parabola. Find its vertex, equation of axis, e...
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4:38
JEE MAINS 2018 If ` vec aa n d vec b`
are the vectors determined by two adjacent sides
of a r...
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2:58
IIT JEE VECTOR ALGEBRA ` vec aa n d vec b`
are two unit vectors that are mutually
perpendicula...
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3:55
IIT JEE CONIC SECTIONS If two tangents drawn from the point `(alpha,beta)`
to the parabola `y^2=4...
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3:26
IIT JEE THREE DIMENSIONAL GEOMETRY If `A(3,2,-4),B(5,4,-6)a n dC(9,8,-10)`
are three collinear po...
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2:23
Let `A B C`
be a triangle and `Da n dE`
be two points on side `A B`
such that `A D=B Edot`
If `...
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2:41
IIT JEE THREE DIMENSIONAL GEOMETRY Find the image of point `(1,2,3)`
in the line `(x-6)/3=(y-7)/2...
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3:03
IIT JEE APPLICATION OF DERIVATIVES If `a x^2+b/xgeqc`
for all positive `x`
where `a gt 0`
and `b ...
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4:31
IIT JEE THREE DIMENSIONAL GEOMETRY The value of `m`
for which straight lein `3x-2y+z+3=0=4 x-3y+...
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4:03
IIT JEE CONIC SECTIONS In triangle `A B C`
, the equation of side `B C`
is `x-y=0.`
The circumcen...
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2:38
IIT JEE CONIC SECTIONS If the tangents to the ellipse `(x^2)/(a^2)+(y^2)/(b^2)=1`
make angles `al...
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1:59
IIT JEE CONIC SECTIONS Tangent drawn from the point `(a ,3)`
to the circle `2x^2+2y^2=25`
will ...
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4:36
IIT JEE CONIC SECTIONS If the length of the common chord of two circles `x^2+y^2+8x+1=0`
and `x^2...