Doubtnut
581 old videos with fewer than 5,000 views from this channel.
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5:12
The number of possible straight lines passing through point(2,3) and forming a triangle with ...
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1:19
The diagram shows 4 bricks enclosing a square. Each brick has length 18 cm and breadth 10 cm. ...
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4:29
If `2^33` is divided by `17`, then the remainder is ltbr gt(1) `15` &nbs..
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6:04
if the two line l1 x + m1 y + n1 =0 and l2 x + m2 y + n2 =0 cut axes at con-cyclic points, the...
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6:00
If `m_1` and `m_2` are the roots of the equation `x^2+(sqrt(3)+2)x+sqrt(3)-1=0`, then the are...
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6:39
The simplified form of `[((a+1)^2/(a-1)^2+3)/((a-1)^2/(a+1)^2+3)]/((a^3+1)/(a^3-1)-(2a)/(a-1...
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3:12
If `(acottheta+bcosectheta)=x` and `(bcottheta+acosectheta)=y`, then `x^2-y^2` is equal to:
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1:42
By what number we should multiply `-20/63` to get `-5/7`
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3:17
If the midpoint of the chord of the ellipse `x^2/16+y^2/25=1`is `(0,3)`
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5:44
Consider f(x) = |1-x |, 1 ltx lt2 and g(x) = f(x) + b sin `pi x/2`, 1 ltx lt2, then which of ...
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5:28
Let A,B, C be nxn real matrices
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2:08
Evaluate `int (e^(logx)+sinx)cosx dx`.
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4:11
`int (1-sin x)/(sinx(1+sin x)) dx`
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2:22
Find `dy/dx`, if `x^6+y^6+6x^2y^2=16`
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3:03
In the given figure,three circles of radius 2 cm touch one another externally.These circles ar...
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3:24
`(2x-13)/5 - (x-3)/11` = `(x-9)/5 + 1`
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1:24
Consider a curve `ax^2 + 2hxy + by^2-1=0` and a point P not on the curve.A line is drawn from t...
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4:07
If `log_4A=log_6B=log_9(A+B)`, then `[4(B/A)]`
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2:44
Cp and CQ are tangents to a circle with centre O. ARB is another tangent touching the circle a...
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6:56
`int_0^pi(xtanx)/(tanx+secx).dx=[pi(pi-2)]/2`
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5:17
two cards are drawn successively with replacement from a pack of 52 cards. Find the probabilit...
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6:30
The mean age of combined group of men and women is 35 years. If the mean age of men is 36 year...
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14:33
Integrate ` ( 1/ (sin^3 x + cos^3 x)) dx`
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4:51
JEE MAINS 2018 Compute the area bounded by the lines x + 2y = 2 , y -x = 1 and 2x + y = 7.