Doubtnut
1,097 old videos with fewer than 5,000 views from this channel.
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The distance between a tangent to the parabola `y^2= 4ax` and a parallel normal is, where `a...
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`Ay^2 + By + Cx + D = 0, (ABC!=0)` be the equation of a paraobola, then
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A magazine seller has 500 subscribers and collects annual subscription charges of Rs.300 per su...
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If the normal at `(am^2, -2am)` to the parabola `y^2 = 4ax` intersects the parabola again at...
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A line passing through (21,30) and normal to the curve `y=2sqrtx`. If m is slope of the normal...
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`f(x)=x/2+(sin2x)/4-(3-c)sinx-3cx` is strictly increasing on R, then the largest integral value...
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The expression `(cos6x+6cos4x+15cos2x+10)/(cos5x+5cos3x+10cosx)` is equal to
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The probability that a candidate passes in physics is 70% and that he passes in chemistry is 40...
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`f(x)=([x]+1)/({x}+1)` for `f:[0,5/2)- gt(1/2,3)`, where [.] represents the fractional part ...
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`f(x) = [2 + 3|n| sin x], n in N, x in (0, pi)`, has exactly 11 points of discontinuity Then th...
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If A`=tan6^0tan42^0 and B=cot66^0cot78^0` , then
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A parabola touches the bisectors of the angle obtained by the lines `x + 2y + 3 = 0 and 2x+ y ...
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`int(x^9)/((4x^2+1)^6) dx` is equal to
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A transversal cut the same branch of a hyperbola `x^2/a^2-y^2/b^2=1` in P,P' and the anymptot...
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JEE MAINS 2018 If `P(alpha, beta)`, the point of intersection of the ellipse `x^2/a^2+y^2/a^2(1-...
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Let `A_alpha=[(cos alpha, -sin alpha,o),(sin alpha, cos alpha,0),(0,0,1)]`
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Find the real solutions to the system of equations `log_(10)(2000xy)-log_(10)x.log_(10)y=4` , `...
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The least value of expression `x^2 +2xy+ 2y^2+4y+ 7` is
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The distance between the pair of parallel line, `x^2+2xy+y^2-8ax-8ay-9a^2=0` is
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If `t-1 and -t-1, t in R` are the roots of `(a+2)x^2 +2ax -1 =0`,then complete set of values of...
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The locus of the center of a circle which touches the circles `|z-z_1|=a, |z-z_2=b|` externally...
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`int_0^(pi/2)sqrt(sinphicos^5phi& dd;phi)`
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`A(x_1, y_1), B(x_2,y_2), C(x_3,y_3)` are three vertices of a triangle ABC. `lx+my+n=0` is an ...
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A variable line L is drawn through O(0, 0) to meet lines L1: 2x + 3y = 5 and L2: 2x + 3y = 10 a...