Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
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2:49
Evaluate `lim_(x- gt0)(x^3cotx)/(1-cosx)`
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6:59
`(x dx-y dy)/(x dy-y dx)=sqrt((1+x^2-y^2)/(x^2-y^2))`
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3:48
Solution of `D*E*(dy)/(dx)=(3x+4y+3)/(12 x+16 y-4)` is
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3:01
`1^3-2^3+3^3-4^3+........+9^3` is equal to
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3:25
If adifferentiabl e function `f (x)=e^x+2x` is given, then equal to `d/(dx) (f^-1(x))` at `
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2:01
23. A and B are two independent events such that `P(A) = 1/2 and P(B)=1/3`. Then P (neither A
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5:29
Which of the following is true If `lim_(x- gta) f(x)- gt0,lim_(x- gta)g(x)- gt0,lim_(x- gta)h
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6:01
Find `(dy)/(dx)` when`(y-tan^(- 1))x/(1+sqrt(1-x^2))+sin[2tan^(- 1)sqrt((1-x)/(1+x))]` ?
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2:12
There are 5 red,4 white and 3 green marbles in a bag. If all are drawn, determine the number o
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4:26
Area of the triangle formed by the tangents from `(x_1,y_1)` to the parabola `y^2 = 4 ax` and
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2:49
Three points `(x_1, y_1), B(x_2, y_2) and C(x , y)` are collinear. Prove that `(x-x_1)(y_2-y_1
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4:57
Tangents are drawn from a point P to the hyperbola `x^2-y^2= a^2` If the chord of contact of t
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10:06
Prove that the tangents to family of hyperbola`x^2/(b^2+lambda) - y^2/b^2 =1` (where `lambda`
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2:40
If the intercept made on the line `y = mx` by the lines `x = 2` and `x = 5` is less then 5, th
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2:48
If P(n) is a statement `(n in N)` such that if P(k) is true, `P(k+1)` is true for `k in N`, t
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3:03
Let `n_1, n_2, n_3, n_4` be vectors normal to the planes `p_1, P_2 P_3, P_4` respectively, the
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2:02
If the value of a third order determinant is 11 then the value of the determinant of `A^(-1)`
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2:12
The matrix `[[1,1,1], [1,1,1], [1,1,1]]` has
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4:10
If f(x)=`|[sin^2x,cos^2x,1],[cos^2x,sin^2x,1],[x-12,12,2]|` then` f'(pi/2)`=
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1:22
If `f:R - gt R` is defined by `f(x)=3x-2` then `f(f(x))+2=`
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2:23
The domain of `f(x)=1/6sqrt(log_10(5x-x^2))`
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4:06
if `int(1-5sin^2x)/(cos^5xsin^2x)dx=f(x)/(cos^5x)+c` then `f(x)`
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4:05
`f(x)=(cos^2x)/(1+cosx+cos^2x)` and `g(x)=ktanx+(1-k)sinx-x`, where `k in R, g'(x)=`
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4:39
In a geometric progression, if the ratio of the sum of first `5` terms to the sum of their re