Doubtnut
18,806 old videos with fewer than 5,000 views from this channel.
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2:39
IIT JEE TRIGONOMETRIC FUNCTIONS If `theta_1` and `theta_2`
are two values lying in `[0,2pi]`
fo...
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4:27
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `alpha,beta`
re the roots of `a x^2+c=b x ,`
...
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3:51
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If the ratio of the roots of `a x ^2+2b x+c=0`
i...
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1:11
IIT JEE LOGARITHM Find the value of log `tan1^0logtan2^0...........logtan89^0`
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6:03
IIT JEE LIMITS AND DERIVATIVES Evaluate:
`[("lim")_(xrarr0)(tan^(-1)x)/x],`
where [.]represen...
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4:10
IIT JEE LOGARITHM Suppose `x , y ,z=0`
and are not equal to 1 and `logx+logy+logz=0.`
Find the va...
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3:01
IIT JEE RELATIONS AND FUNCTIONS If `f(n+1)=(2F(n)+1)/2,n=1,2,3,.... a n d` `F(1)=2.`
Then `F(101...
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2:40
Range of `f(theta)=cos^2theta(cos^2theta+1)+2sin^2theta`
is
`[3/4,1]`
(b) `[3/(16),1]`
(c) `[...
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3:01
JEE MAINS 2018 Find the length of the perpendicular drawn from
the point `(5,4,-1)`
. to the ...
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7:32
IIT JEE RELATIONS AND FUNCTIONS The domain of the function `f(x)=1/sqrt((1^10C_(x-1)-3X^10C_x))`
...
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1:45
IIT JEE TRIGONOMETRIC FUNCTIONS In ` A B C ,l e tR=c i r c u m r a d i u s ,r=in r a d i u sdot`
...
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1:36
IIT JEE PERMUTATIONS AND COMBINATIONS Find the number of distinct throws which can be thrown with...
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2:32
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C ,ifA-B=120^0a n dR=8r ,w h e r eRa n dr`
have ...
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4:12
IIT JEE RELATIONS AND FUNCTIONS The domain of the function `f(x)=x/(sqrt(sin(lnx)-cos(lnx))),(n i...
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2:03
In how many ways te sum of upper faces of four distinct dices can be
six.
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2:07
IIT JEE PERMUTATIONS AND COMBINATIONS In how many ways can a party of 6 men be selected out of 10...
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2:20
IIT JEE TRIGONOMETRIC FUNCTIONS If two sides of a triangle are roots of the equation `x^2-7x+8=0`...
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3:48
IIT JEE PERMUTATIONS AND COMBINATIONS Consider the equation `2/x+5/y=1/3w h e r ex ,y in Ndot`
Fi...
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2:38
IIT JEE RELATIONS AND FUNCTIONS If `f`
is a function such that `f(0)=2,f(1)=3,a n df(x+2)=2f(x)-f...
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3:38
IIT JEE LOGARITHM Prove that
`(2^((log)_2 1/4x)-3^(log)_(27)(x^2+1)^3-2x gt )/(7^(4(log)_(49)x)-...
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4:25
The set of values of `lambda in R`
such that `sin^2theta+costheta=lambdacos^2theta`
holds for ...
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1:12
IIT JEE SEQUENCES AND SERIES If `a ,1/b ,c` and`1/p ,q ,1/r`
form two arithmetic progressions of...
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1:36
IIT JEE TRIGONOMETRIC FUNCTIONS Minimum value of `y=256sin^2x+324cos e c^2x,AAx in R` is (a) 432 ...
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1:38
Solve the following equation for `x`:
`tan^(-1)((2x)/(1-x^2))+cot^(-1)((1-x^2)/(2x))=(2pi)/3...