Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
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2:42
A bag contains 10 tickets numbered 1 to 10. Tickets are drawn one by one without replacement.
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2:48
Let A be any `3xx3` invertible matrix. Thenwhich one of the following is not always true?
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8:01
Prove that `int_0^(pi/2)(dx)/(a^2cos^2x+b^2sin^2x)=pi/(2a b)(a , b gt0)`
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3:51
If `Dr=|[r,n+1,1],[r^2,2n-1,(2n+1)/3],[r^3,3n+2,(n(n+1))/2]|`, show that `sum_(r=1)^n Dr=0`
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2:27
The mean of a set of numbers is `X.` If each number is decreased by `lambda,` the mean of the
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10:14
To the circle `x^2 + y^2 = 4` two tangents are drawn from `P (-4, 0)`, which touch the circle
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17:14
`int(dx)/((1+x)sqrt(1+x-x^2))` dx
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3:21
If `f(x)=x^3+3x^2+4x+ bsinx+ c cosx AA x in R` is a one-one function then the value of `b^2 +
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4:18
If `int_0^(pi)xf(sinx)dx=Aint_0^(pi/2)f(sinx)dx`, then A is
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2:33
`cot(sin^(- 1)1/(sqrt(5))+sin^(- 4)2/(sqrt(5)))`
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0:55
If the upper and lower limits of a class are `x` and `y` respectively and `l` be the length of
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3:01
how many of the arrangement of the letter of the world "LOGARITHM" begin witha vowel and end w
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8:48
(c) Answer any one question5x1=5(G) Find the equation of a plane passing through the line of
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5:46
.Find the equation ofthe circle which passes through the focus ofthe parabola `x^2=4y` and tou
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8:32
If `alpha and beta` are the roots of the equation `x^2-4x + 1=0 (alpha lt beta)` then find t
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1:55
In how many ways the number 10800 can be resolved as a product of two factors?
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5:48
Find the number of ways in which n, '1' and n '2' can be arranged in a row so that upto any po
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1:55
The third derivative of a function `f'''(x)` vanishes for all `f(0)=1,f'(1)=2 and f''=-1,` the
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3:10
If X is a binomial variate with the range `{0, 1, 2, 3, 4, 5, 6}` and `P(X= 2) = 4P(X = 4)` ,
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8:32
The combined equation of bisector of angles between the lines `L_1 and L_2` is `2x^2 - 3xy
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5:12
Prove that `int_(-pi) ^pi cosmx cosnx dx = `
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5:08
.Find the equation of a straight line, which passes through the point (a, 0) and whose line L
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4:11
If two times the square of the diameter of the circumcircle of a triangle is equal to the sum
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4:02
Solve for `x` and `y : 3x^2-5y^2 = 7, 3xy- 4y^2=2`