The maximum value of the function f(x) = sin(x + π/6) + cos (x + π/6) in the interval (0, π/2) occurs at :
The area bounded by the curve y2 = 9x and the lines x = 1, x = 4 and y = 0 in the first quadrant is
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Let f(x) = x - |x - x2|, x ∈[-1, 1]. Then the number of points at which f(x) is discontinuous is
If in the expansion of [(x4)+(1/x3)]15 in rth term x4 occurs, then r=
The correct statement regarding the position of point (-6,2) with respect to lines 2x+3y-4=0 and 6x+9y+8=0 is
If two circles of equal radii a and with centres (2,3) and (5,6) cut each other at right angle then, a=
Equation [(x2)/(2-r)]+[(y2)/(r-5)]+1=0 represents an ellipse if
The degree and order of the differential equation of the family of all parabolas whose axis is x-axis are respectively
If cot⁻1[(cos α)1∕2] - tan⁻1[(cot α)1∕2] = x, then sin x =
Let f(x) be a function such that f'(a) ≠ 0. Then at x = a,f(x)
The number of partition values in case of quartiles is:
Given the following data:
No. of observation = 1000
Arithmetic mean = 1000
Variance = 256.0
The co-efficient of variance will be equal to
The equation of pair of lines passes through (1,1) and perpendicular to lines 3x2-7xy-2y2=0 is
The probability that a card drawn from a pack of 52 cards will be diamond or king is
In an election there are five candidates for three places. A man can vote for maximum number of candidates. In how many total ways can a men vote?
In a Δ ABC , the inradius and three exradii are r , r1 , r2 and r3 respectively. In usual notations the value of r. r1.r2.r3 is equal to
The sum of the series 1.32+ 2.52 + 3.72 +.....upto 20 terms is
If α, β are the roots of the equation x2 + x + 1 = 0 and (α/β), (β/α) are the roots of x2 + px + q = 0, then p is equal to
In the set W of whole numbers an equivalence relation R is defined as follows :
aRb iff both a and b leave same remainder when divided by 5. The equivalence class of 1 is given by
If lines 2x+3ay-1=0 and 3x+4y+1=0 are metually perpendicular, then a =
The tangent to a given curve y=f(x) is perpendicular to x-axis if