Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
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5:01
Consider an equilateral triangle having verticals at point `A(2/sqrt3 e^((lpi)/2)),B(2/sqrt3 e
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4:36
The expression `[(1+sin(pi/8)+icos(pi/8))/(1+sin(pi/8)-icos(pi/8))]^8` is equal is
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3:34
In `Delta ABC, (CotB + CotC) (CotC-CotA) (CotA+CotB) =`
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3:24
The percentage of marks obtained by a student in the monthly unit tests are given Based on the
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5:07
The Indian cricket team with eleven players, the team manager, the physiotherapist and two ump
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3:32
Equation of circle which touches the axis of y at (0, 3) and cuts an intercepts of 8 units on
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6:50
Consider three vectors `vecp=hati+hatj+hatk,vecq=2hati+4hatj-hatk and vecr=hati+hatj+3hatk`
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6:31
Find sum of all possible integral value `(s)` of 'p' for which the equation `|x+1/x-3|=p-3` ha
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4:07
If `f(x) = |1 -x|,` then the points where `sin^-1 (f |x|)` is non-differentiable are
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5:32
Let the function `f ; R-{-b}- gtR-{1}` be defined by `f(x) =(x+a)/(x+b),a!=b,` then
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2:49
Let `f(x)=[9^x-3^x+1]` for all `x in (-oo, 1),` then the range of `f(x)` is, ([.] denotes the
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1:55
The domain of definition of `f(x)=cos^(- 1)(x+[x])` is
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Find the height of the triangle whose base is 4cm and area is `20cm^2`
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If `R ={(x, y) : x, y in Z` and `x^2+y^2=49}` is a relation, then which of the following eleme
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4:22
The equation of the image of the curve `x^2 - y^2= 4`with respect to the line `x + y-2=0`, is
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3:39
In `Delta ABC, (b-c)/a cos^2 (A/2) + (c-a)/b cos^2(B/2) + (a-b)/c cos^2 (C/2)=`
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3:41
Solve graphically `y=(x+2)/(x-2)`
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1:39
In `Delta ABC` if `a:b:c=3:4:5` then `sinA:sinB:sinC` is
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Find `d/dx` `tan^(- 1)(x/(1+sqrt(1-x^2)))`
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1:23
find matrix `2[[2,3],[-1,5]]+[[1,2],[3,4]]`
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Let S denotes the set of real values of 'a' for which the roots of the equation `x^2-ax-a^2
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P & Q are centres of circles of radii 9 cm and 2cm respectively. PQ = 17 cm. R is the centre
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6:34
Prove that the minimum length of the intercept made by the axes on the tangents to the ellipse
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3:48
The equation `ax+by +c=0` represents a plane perpendicular to the