Doubtnut
19,218 old videos with fewer than 5,000 views from this channel.
-
4:02
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If the equations `x^2+p x+q=0a n dx^2+p^(prime)...
-
7:36
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Let vertices of an acute-angled triangle are `A(z...
-
3:03
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C ,`
if `cotA *cotC=1/2a n dcot B* cotC=1/(18),...
-
4:11
IIT JEE TRIGONOMETRIC FUNCTIONS If `cos(A+B+C)=cosAcosBcosC ,`
then find the value of
`(8sin(B+C)...
-
7:05
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Consider two complex numbers `alphaa n dbeta`
as...
-
3:45
IIT JEE RELATIONS AND FUNCTIONS Let `f: RvecR`
be a continuous and differentiable function such t...
-
6:37
IIT JEE RELATIONS AND FUNCTIONS The possible values of `a`
such that the equation `x^2+2a x+a=sqr...
-
3:57
IIT JEE TRIGONOMETRIC FUNCTIONS If `x+y+z=pi/2,`
then prove that
`|[sinx,siny,sinz],[cosx,cosy,...
-
6:22
Find the equation of the set of all points whose distances from (0,4) are `2/3` of their distan...
-
2:37
JEE MAINS 2018 Form the differential equation of the family of
curves represented `c(y+c)^2=x...
-
2:47
IIT JEE LOGARITHM If `(log)_a x=b`
for permissible values of `a` and `x ,`
then identify the st...
-
1:44
IIT JEE SEQUENCES AND SERIES If `H_n=1+1/2++1/ndot`
, then the value of `S_n=1+3/2+5/3++(99)/(50...
-
2:58
IIT JEE TRIGONOMETRIC FUNCTIONS One angle of an isosceles triangle is `120^0`
and the radius of i...
-
2:58
IIT JEE TRIGONOMETRIC FUNCTIONS One angle of an isosceles triangle is `120^0`
and the radius of i...
-
1:22
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C ,2a csin(1/2(A-B+C))`
is equal to
`a^2+b^2-c^2...
-
3:07
IIT JEE TRIGONOMETRIC FUNCTIONS Which of the following pieces of data does NOT uniquely determine...
-
1:50
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C ,a , b , c`
are the lengths of its sides and ...
-
8:50
IIT JEE BINOMIAL THEOREM If `n gt 2,`
then prove that `C_1(a-1)-C_2xx(a-2)++(-1)^(n-1)C_n(a-n)=a ...
-
1:32
JEE MAINS 2018 Form the differential equation not containing the
arbitrary constants and sati...
-
4:24
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Let `P(x)=x^3-8x^2+c x-d`
be a polynomial with r...
-
2:14
IIT JEE SEQUENCES AND SERIES If the sum to infinity of the series `1+2r+3r^2+4r^3+`
is 9/4, then...
-
4:12
IIT JEE RELATIONS AND FUNCTIONS Domain (D) and range (R) of `f(x)=sin^(-1)(cos^(-1)[x]),`
where ...
-
2:34
IIT JEE RELATIONS AND FUNCTIONS If `f(x+1)+f(x-1)=2f(x)a n df(0),=0,`
then `f(n),n in N ,`
is
...
-
6:25
IIT JEE BINOMIAL THEOREM Prove that `(C_1)/2+(C_3)/4+(C_5)/6+=(2^(n+1)-1)/(n+1)dot`