Doubtnut
18,806 old videos with fewer than 5,000 views from this channel.
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5:03
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS The quadratic `x^2+a x+b+1=0`
has roots which a...
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4:07
IIT JEE TRIGONOMETRIC FUNCTIONS If `x=(2sintheta)/(1+costheta+sintheta),t h e n(1-costheta+sinthe...
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3:30
IIT JEE TRIGONOMETRIC FUNCTIONS The value of `cot70^0+4cos70^0`
is
(a)`1/(sqrt(3))`
(b) `sqrt...
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2:46
IIT JEE TRIGONOMETRIC FUNCTIONS The general solution of the equation `8cosxcos2xcos4x=(sin6x)/(si...
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2:47
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C`
, base `B C`
and area of triangle are fixed...
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2:51
IIT JEE PERMUTATIONS AND COMBINATIONS In how any ways can 8 different books be distributed among ...
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3:08
IIT JEE TRIGONOMETRIC FUNCTIONS One of the general solutions of `4sinthetasin2thetasin4theta=sin3...
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2:53
IIT JEE PERMUTATIONS AND COMBINATIONS Find the number of non-negative integral solutions of `x+y+...
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4:57
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If the root of the equation `(a-1)(x^2-x+1)^2=(a+...
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3:48
IIT JEE APPLICATION OF DERIVATIVES If water is poured into an inverted hollow cone whose semi-ve...
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1:51
IIT JEE SEQUENCES AND SERIES Find the sum of the series `2/(1xx2)+5/(2xx3)xx2+(10)/(3xx4)xx2^2+(1...
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2:27
IIT JEE RELATIONS AND FUNCTIONS The domain of ` sqrt(log_10((5x-x^2)/4))` is
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1:43
In Figure, `D , E`
are points on sides `A B`
and `A C`
respectively of ` A B C ,`
such that `a ...
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3:26
IIT JEE RELATIONS AND FUNCTIONS The function `f(x)=sin(log(x+sqrt(1+x^2)))`
is
(a) even function ...
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2:50
Triangles `A B C`
and +DBC are on the same base `B C`
with A, D on opposite side of line `B C ,...
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4:59
IIT JEE RELATIONS AND FUNCTIONS The function `f: NvecN(N`
is the set of natural numbers) defined ...
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4:00
IIT JEE TRIGONOMETRIC FUNCTIONS If `cosx=tany ,cosy=tanz ,cosz=tanx ,`
then the value of `sinx`
...
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2:38
IIT JEE TRIGONOMETRIC FUNCTIONS If `secx+sec^2x=1`
then the value of `tan^8x-tan^4x-2tan^2x+1`
...
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3:07
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS `x^2-x y+y^2-4x-4y+16=0`
represents
a. a point
...
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2:46
IIT JEE TRIGONOMETRIC FUNCTIONS Given that the side length of a rhombus is the geometric mean of ...
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2:17
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `alpha,beta`
are the roots of `a x^2+b x+c=0a...
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3:39
IIT JEE LIMITS AND DERIVATIVES Evaluate:
`("lim")_(xvec0)(tanx-sinx)/(x^3)`
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5:27
IIT JEE TRIGONOMETRIC FUNCTIONS Let `A D`
be a median of the ` A B Cdot`
If `A Ea n dA F`
are ...
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4:02
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS The equation `(x^2+x+1)^2+1=(x^2+x+1)(x^2-x-5)`
...