Doubtnut
18,806 old videos with fewer than 5,000 views from this channel.
-
2:46
JEE MAINS 2018 Given that `P(3,2,-4),Q(5,4,-6)a n dR(9,8,-10)`
are collinear. Find the ratio in ...
-
3:47
IIT JEE TRIGONOMETRIC FUNCTIONS Number of roots of the equation `(3+cos"x")^2=4-2sin^8x ,x in [0,...
-
3:31
IIT JEE TRIGONOMETRIC FUNCTIONS In a triangle, if the angles `A , B ,a n dC`
are in A.P. show tha...
-
5:20
IIT JEE TRIGONOMETRIC FUNCTIONS In a triangle `A B C ,/_c=60^0a n d/_A=75^0`
. If `D`
is a poin...
-
2:19
IIT JEE RELATIONS AND FUNCTIONS Let `f(x)=tanxa n dg(f(x))=f(x-pi/4),`
where `f(x)a n dg(x)`
ar...
-
1:33
IIT JEE RELATIONS AND FUNCTIONS Let `f(x)={1+|x|,x lt -1[x],xgeq-1`
, where [.] denotes the great...
-
2:31
IIT JEE SEQUENCES AND SERIES Let `a in (0,1]` satisfies the equation `a^(2008)-2a+1=0` and `S=1+...
-
1:56
IIT JEE SEQUENCES AND SERIES If `a , x ,a n db`
are in A.P., `a ,y ,a n db`
are in G.P., and `a ...
-
3:40
IIT JEE TRIGONOMETRIC FUNCTIONS The number of roots of `(1-tantheta)(1+sin2theta)=1+tanthetaforth...
-
4:30
IIT JEE LIMITS AND DERIVATIVES If `(x-a)^2+(y-b)^2=c^2,`
for some `c >0,`
`p rov e t h a ...
-
5:46
IIT JEE TRIGONOMETRIC FUNCTIONS A circular ring of radius 3cm hangs horizontally form a point 4cm...
-
1:19
IIT JEE LIMITS AND DERIVATIVES If `f(x)=x|x|,`
then prove that `f^(prime)(x)=2|x|`
-
3:42
IIT JEE SEQUENCES AND SERIES If `S_n=1^2-2^2+3^2-4^2+5^2-6^2+ ,t h e n`
`S_(40)=-820`
b. `S_(2n...
-
6:05
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Find the real part of `(1-i)^(-i)dot`
-
2:49
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Find the complex number `z`
satisfying `R e(z^2 ...
-
4:58
IIT JEE TRIGONOMETRIC FUNCTIONS If `A=pi/5,`
then find the value of `sum_(r=1)^8tan(r A)*tan((r+...
-
5:00
IIT JEE LIMITS AND DERIVATIVES If
`L=lim_(x- gt 0)(sin2x+asinx)/(x^3)`
is finite, then find ...
-
4:25
IIT JEE TRIGONOMETRIC FUNCTIONS Number of solution(s) satisfying the equation `1/(sinx)-1/(sin2x)...
-
4:03
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `z=x+i ya n dw=(1-i z)//(z-i)`
, then show tha...
-
2:05
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Identify locus `z`
if `R e(z+1)=|z-1|`
-
1:38
IIT JEE LIMITS AND DERIVATIVES Evaluate:
`lim_(x- gt 0)(logcosx)/x`
-
3:00
IIT JEE TRIGONOMETRIC FUNCTIONS If the area of the circle is `A_1`
and the area of the regular pe...
-
3:18
Prove that the sum of the radii of the radii of the circles, which are,
respectively, inscri...
-
5:57
IIT JEE RELATIONS AND FUNCTIONS Which of the following functions has inverse function?
`f: Zrar...