Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
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4:33
The probability of a candidate passing an examination at any one attempt is `3/5`.He carries o
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4:42
`int (cos 5x + cos 4x)/(1-2cos3x) dx`
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4:25
`int_0^1y` dx where `x=cos2y`
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4:03
`int_0^1(2sin^(- 1)(x/2))/x dx` is equal to
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3:48
`int_1^2(1/x-1/(x^2))e^x dx=e(e/2-1)`
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3:04
`(9^1 + 9^2 + 9^3 +..+9^14)` is divided by `6`.
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4:49
The number of solutions `(x, y)` where x and y are integers, satisfying `2x^2 + 3y^2 + 2x + 3
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5:37
How many different (i) combination (ii) permutation can be made by using four letters of the w
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2:21
How many words can be formed using the letter of the word LAUGHTER if(i) vowels do not occur s
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2:24
The average of the middle two fractions if `4/7,1/3,2/3,5/9` are arranged in ascending order is
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2:34
The total worth of three prizes is Rs. 2550. If the value of second prize is `(3/4)^(th)` of t
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3:46
`int sin(2x)/(acos^@x+bsin^2x) dx=`
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2:41
Find the real values of x and y for which `z_1 = 9y^2-4-10ix` and `z_2 = 8y^2-20i` are conjug
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4:16
A tangent to the ellipse `16x^2 + 9y^2 = 144` making equal intercepts on both the axes is
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11:16
The exact value of `cos((2pi)/28)cosec((3pi)/28)+cos((6pi)/28)cosec((9pi)/28)+cos((18pi)/28)c
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2:19
FInd the sign of `sec2000^@`
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4:34
45.Write down the expansion of `(4.x-y/4)^4`By giving suitable values to x and y, obtain the
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1:17
In `DeltaABC, /_A` is right angle, `AD _|_ BC and /_C=40^@` then `/_BAD=`
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1:19
In a class of 50 students, 15 are girls. 5 of the girls and `2/7` of the boys were chosen tore
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4:34
Make a rough sketch of the region given below and find its area using integration `{(x,y): 0
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4:30
If ABCD is a trapezium, `AB || CD. AECD` is a rhombus and E is the midpoint of AB and thearea
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2:09
The total age of a father and son now is 50 years. After 10 years their ages will be in the ra
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8:35
If from the vertex of a parabola `y^2=4x` a pair of chords be drawn at right angles to one an
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5:39
Let `f(x)=int_(x^2)^(x^3)` for `x gt 1 and g(x)=int_1^x (2t^2-Int)f(t)dt (x lt 1)` then