Doubtnut
2,146 old videos with fewer than 5,000 views from this channel.
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2:51
Given `f(x)= sqrt(8/(1-x)+8/(1+x))` and `g(x) = 4/(f(sinx))+4/(f(cosx))` then `g(x)` is
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3:19
If `x=f(t) and y=phi(t),` prove that `(d^2y)/(dx^2)=(f_1phi_2-f_2phi_1)/(f_1^3)` where suffixe
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4:44
The ends of the latus rectum of the parabola `(x-2)^2=-6(y+1)` are
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1:47
`1/sqrt(8+2+sqrt(15))=`__________.
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8:22
If `int_0^1xlog(1+x/2)dx=a+b*log2/3 then a=`___.
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8:25
Let `f(x)=[x] and g(x)={0, x in Z x^2, x in R -Z` then (where [.]denotest greatest integer f
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3:14
If both the expressions `x^1248-1 and x^672 -1,` are divisible by `x^n - 1,` then the greatest
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5:34
If `|x+1|+y=5 and x-|y|=2,` find `x+y`
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2:22
Find LCM of `(b c^2-a b c)^2, b^2(a c^2-a^3) and a^2c^2+2a c^3+c^4`
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2:18
Find the square root of `(4a + 5b + 5c)^2- (5a + 4b + 4c)^2 + 9a^2`
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3:20
`int_0^pi((2x+3)sinx)/((1+cos^2x)dx`
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3:59
If `x^3 - 3x + 2 gt= 0`, then the minimum value of x is
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5:00
if `log_9 x+log_4 y=7/2` and `log_9 x -log_8y =-3/2` then `x+y ` is
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3:44
Let `g(x) =sqrt(sin^(-1)(cos(tan^(-1)x))+cos^(-1)(sin(cot^(-1)x))` , then `int_(-sqrt(pi/2))^s
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4:29
Let `alpha =2tan^-1(1/2)+sin^(-1)3/5 and beta=sin^-1(12/13)+cos^-1(4/5)+cos^-1(16/63)` be such
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2:31
Which of the following is equivalent to `sqrt(3sqrt(4sqrt(x^3/x))/x` if no division by zero oc
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2:14
The sum `sqrt(5/4+sqrt(3/2))+sqrt(5/4-sqrt(3/2))` is equal to
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4:00
Let `a,b,c,d, a in R` and satify the relations `a(b-c)^2+a_1bc=c-0 and a(b+c_1)^2+a_2bc_1+c=1
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3:21
If `a gt b,` find the maximum or minimum value of the `a sin^2 x + b cos^2 x.`
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2:18
If `alpha,beta` are the roots of `x^2-k(x+1)-c=0` then `(1+alpha)(1+beta)=`
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4:40
Range of `f(x)=cot^(- 1)x+tan^(- 1)x+c o s e c^(- 1)x` is
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4:27
The equation of the tangent to the parabola `y = (x - 3)^2` parallel to the chord joining the
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3:02
If the function `g:(-oo,oo)- gt(-pi/2,pi/2)` is given by `g(u)=2tan^-1(e^u)-pi/2.` Then, `g` i
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2:45
the value of `lim_(n- gtoo) {1/(n^3+1)+4/(n^3+1)+9/(n^3+1)+.................+n^2/(n^3+1)}`