Doubtnut
19,218 old videos with fewer than 5,000 views from this channel.
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2:50
IIT JEE TRIGONOMETRIC FUNCTIONS If `a in (0,1)a n df(a)=(a^2-a+1)+(8sin^2a)/(sqrt(a^2-a+1))+(27 c...
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3:13
IIT JEE TRIGONOMETRIC FUNCTIONS The value of `f(alpha)=sqrt(cos e c^2alpha-2cotalpha)+sqrt(cos e ...
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4:24
IIT JEE TRIGONOMETRIC FUNCTIONS If `x=secvarphi-tanvarphia n dy=cos e cvarphi+cotvarphi,`
then
`x...
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4:21
Evaluate: `inte^(2x)((1+sin2x)/(1+cos2x))dx`
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2:48
IIT JEE RELATIONS AND FUNCTIONS The number of real solutions of the `(log)_(0. 5)|x|=2|x|`
is
1 ...
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5:07
IIT JEE RELATIONS AND FUNCTIONS If `f(x)=m a xi mu m{x^3, x^2,1/(64)}AAx in [0,oo),t h e n`
`f(...
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2:33
IIT JEE RELATIONS AND FUNCTIONS The period of function `2^({x})+sinpix+3^({x/2})+cos2pix`
(where ...
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12:37
IIT JEE PERMUTATIONS AND COMBINATIONS In how many ways can 14 identical toys be distributed among...
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2:17
IIT JEE TRIGONOMETRIC FUNCTIONS `sec^2theta=(4x y)/((x+y)^2)`
is true if and only if
`x+y!=0`
(b...
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3:29
IIT JEE RELATIONS AND FUNCTIONS Given the function `f(x)=(a^x+a^(-x))/2(w h e r ea gt 2)dotT h e ...
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4:36
IIT JEE RELATIONS AND FUNCTIONS The equation `||x-2|+a|=4`
can have four distinct real solutions ...
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2:28
IIT JEE CONTINUITY AND DIFFERENTIABILITY If `f(x)=max{x^2+2a x+1, b}`
has two points of non-diffe...
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4:42
IIT JEE BINOMIAL THEOREM If `aa n db`
are distinct integers, prove that `a-b`
is a factor of `a^n...
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1:55
If two arcs of a circle (or of congruent circles) are congruent, then
corresponding chords a...
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2:13
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Solve:
`i x^2-3x-2i=0,`
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3:58
IIT JEE TRIGONOMETRIC FUNCTIONS If `tan^2((pi-A)/4)+tan^2((pi-B)/4)+tan^2((pi-C)/4)=1`
, then ` ...
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6:04
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Show that the polynomial `x^(4p)+x^(4q+1)+x^(4r+2...
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4:31
IIT JEE LOGARITHM Solve:
`(1/2)^(log)_(10)a^2+2 gt 3/(2^((log)_(10)(-a)))`
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3:48
IIT JEE TRIGONOMETRIC FUNCTIONS Which of the following expresses the circumference of a circle
...
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2:39
IIT JEE TRIGONOMETRIC FUNCTIONS The area of the circle and the area of a regular polygon of `n`
s...
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6:38
IIT JEE CONTINUITY AND DIFFERENTIABILITY Which of the following function is not differentiable at...
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2:16
IIT JEE TRIGONOMETRIC FUNCTIONS If `R_1`
is the circumradius of the pedal triangle of a given tri...
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2:47
IIT JEE RELATIONS AND FUNCTIONS The domain of the function `f(x)=sqrt(x^2-[x]^2)`
, where `[x]`
i...
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3:21
If two chords `A B`
and `A C`
of a circle with centre `O`
are such that the centre `O`
lies on ...