Doubtnut
18,806 old videos with fewer than 5,000 views from this channel.
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3:51
IIT JEE TRIGONOMETRIC FUNCTIONS If `alpha,beta,gamma, in (0,pi/2)`
, then prove that `(s i(alpha+...
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4:10
Find the mean deviation from the mean for the following data: Size: 1 3 5 7 9 11 13 15 Frequency...
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0:46
IIT JEE SEQUENCES AND SERIES Three numbers are in G.P. If we double the middle term, we get an A....
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3:26
Calculate mean deviation about mean from the following data: `x_i :` 3 9 17 23 27 `f_i :` 8 10 1...
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7:57
IIT JEE TRIGONOMETRIC FUNCTIONS If `(cos^4A)/(cos^2B)+(sin^4A)/(sin^2B)=1`
then prove that
`(i...
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4:04
For a frequency distribution mean deviation from mean in computed by `MdotDdot=(sumf)/(sumf|d|)`...
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3:02
IIT JEE APPLICATION OF DERIVATIVES If the curve `y=a x^2-6x+b`
pass through `(0,2)`
and has its ...
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2:01
IIT JEE INVERSE TRIGONOMETRIC FUNCTIONS If `y=tan^(-1)1/2+tan^(-1)b ,(0 lt b lt 1)a n d0 lt ygeqp...
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3:47
Divide 28 into four parts in an A.P. so that the ratio of the product
of first and third wit...
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4:07
IIT JEE TRIGONOMETRIC FUNCTIONS If in ` A B C ,A=pi/7,B=(2pi)/7,C=(4pi)/7`
then `a^2+b^2+c^2`
mus...
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1:53
IIT JEE SEQUENCES AND SERIES The fourth, seventh, and the last term of a G.P. are 10, 80, and 256...
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2:08
IIT JEE INVERSE TRIGONOMETRIC FUNCTIONS If `x , y , z`
are natural numbers such that `cot^(-1)x+c...
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5:14
IIT JEE RELATIONS AND FUNCTIONS Draw the graph of the function:
`f(x)=|x^2-3|x|+2|`
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3:40
IIT JEE TRIGONOMETRIC FUNCTIONS In ` A B C`
Prove that `cos^2A/2+cos^2B/2+cos^2C/2lt=9/4dot`
In...
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7:36
IIT JEE APPLICATION OF DERIVATIVES Find the condition that the line `A x+B y=1`
may be normal to...
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6:13
IIT JEE APPLICATION OF DERIVATIVES If the tangent at `(1,1)`
on `y^2=x(2-x)^2`
meets the curve a...
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5:46
IIT JEE APPLICATION OF DERIVATIVES Does there exists line/lines which is/are tangent to the curv...
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4:12
IIT JEE INVERSE TRIGONOMETRIC FUNCTIONS The value of `tan^(-1)4/7+tan^(-1)4/(19)+tan^(-1)4/(39)+t...
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2:12
IIT JEE LIMITS AND DERIVATIVES If `sqrt(x)`
+`sqrt(y)=4,t h e nfin d(dx)/(dy)a ty=1.`
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2:14
IIT JEE LIMITS AND DERIVATIVES If `x y+y^2=tanx+y ,t h e nfin d(dy)/(dx)dot`
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5:53
IIT JEE LIMITS AND DERIVATIVES The value of
`("lim")_(xvec0)(sinx+(log)_e(sqrt(1+sin^2x)-sinx)/(s...
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2:48
IIT JEE BINOMIAL THEOREM Find the coefficient of `x^(20)`
in `(x^2+2+1/(x^2))^(-5)(1+x^2)^(40)dot`
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3:29
IIT JEE BINOMIAL THEOREM The number of terms in the expansion of `(a+b+c)^n ,w h e r en in Ndot`
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2:32
IIT JEE RELATIONS AND FUNCTIONS Let `f`
be a function satisfying of `xdot`
Then `f(x y)=(f(x))/y`...