Doubtnut
1,097 old videos with fewer than 5,000 views from this channel.
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4:11
Let 'L' be the point `(t, 2) and 'M'` be a point on the y axis such that `'L M'` has slope `...
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4:31
If `a^2,b^2 and c^2` be in `A.P.` prove that `cot A,cot B and cot C` are in `A.P.` also.
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2:04
Domain of `log_([x+1]) (x-1)` is ( [.] represents greatest integer function)
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2:20
Find the area of the region bounded by the curve y-3 and the lines y = x + 6 and y =0.
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4:43
Tangents are drawn from points on the line `x-y+2 =0` to the ellipse `x^2 +2y^2=4`, then all th...
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4:50
The value of `int_0^(2pi)[2 sin x] dx`, where `[.]` represents the greatest integral function...
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6:18
Find the remainder when `84^79` is divided by 100.
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3:40
The first term of an infinitely decreasing G.P. is unity and its sum is S. The sum of the squar...
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5:03
`|[x,c+x,b+x],[c+x,x,a+x],[b+x,a+x,x]|=0`
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3:56
`sqrt((1+i)/(1-i))`
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5:11
`"F i n d"int(1-x^2)^(- 2)dx`
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3:10
Three persons A, B and C speak at a function along with 5 other persons. If the persons speak ...
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4:21
Find the sum of the series `cos^3alpha + cos^3 2alpha +......` to n terms
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4:31
`((30),(0)) ((30),(10))- ((30),(1)) ((30),(11))+ ((30),(2))((30),(12))+......((30),(20))((30),(...
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3:51
The chance that a 13 card combination from a pack of 52 playing cards is dealt to a player in a...
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2:30
If `sinalpha=3/(sqrt(73)),cosbeta=11/(sqrt(146))` where `alpha,beta in [0,pi/2]` then `(alph...
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2:12
if `a = 7- 4sqrt3`, find the value of `sqrta +1/sqrta`
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3:11
If `2f(x)+f(3-x)= x^2 + 1`,then the function f(x) is equal to
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3:38
A & B throw with one dice for a stake of Rs. 99/- which is to be won by the player who first th...
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3:17
The value of definite integral `int_0^oo In (x+1/x) (dx)/(1+x^2)` is equal to
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3:02
A motorcycle licence plate has two letters and then four numbers in it.How many plates can be m...
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4:54
One of the eigen vectors of the matrix `[(-5,2),(-9,6)]` is
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2:01
If `sin3theta = sin theta`, then general solution is
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3:54
Tangents are drawn to the ellipse `x^2 +2y^2=4` from any arbitrary point on the line `x +y=4`,...