Recent questions tagged q70

If $u= \sin ^{-1} \bigg( \large\frac{x^2+y^2}{x+y}\bigg)$ then $x \large\frac{\partial u}{\partial x}$$+ y \large\frac{\partial u}{\partial y}$ is equal to :

asked Nov 6, 2013 by meena.p

1 answer

DNA polymerase for industrial use in Polymerase Chain Reaction (PCR) is produced by :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

The dehydration yield of cyclohexanol to cyclohexene is 75%.What would be the yield if 100g of cyclohexanol is dehydrated?

asked Oct 29, 2013 by sreemathi.v

1 answer

If $z= \log (\tan x +\tan y)$, then $(\sin 2x) \large\frac{\partial z}{\partial x}$$+(\sin 2y) \large\frac{\partial z}{\partial y}$ is equal to

asked Oct 28, 2013 by meena.p

1 answer

Match the following

asked Oct 18, 2013 by thanvigandhi_1

1 answer

If $z= \sec^{-1} \bigg(\large\frac{x^4+y^4-8x^2y^2}{x^2+y^2}\bigg)$ then $x \large\frac{dz}{dx}$$+ y \large\frac{dz}{dy}=$

asked Oct 18, 2013 by meena.p

1 answer

The function $f(x) =x^3+ax^2+bx+x, a^2 \leq 3b$ has:

asked Oct 10, 2013 by meena.p

1 answer

In $\Delta ABC$ if $\large\frac{1}{b+c}+\frac{1}{c+a}=\frac{3}{a+b+c}$ then $c$ is equal to

asked Oct 10, 2013 by sreemathi.v

1 answer

Choose the wrong statement with reference to mutation theory :

asked Oct 7, 2013 by thanvigandhi_1

1 answer

The longest distance of the point $(a,0)$ from the curve $2x^2+y^2=2x$ is :

asked Sep 27, 2013 by meena.p

1 answer

If the circle $x^2+y^2+8x-4y+c=0$ touches the circle $x^2 +y^2+2x+4y-11=0$ externally and cuts the circle $x^2+y^2-6x+8y+k=0$ orthogonally then $k=$

asked Sep 23, 2013 by meena.p

1 answer

If the curves $x^2+py^2=1$ and $qx^2+y^2=1$ are orthogonal to each other, then

asked Sep 17, 2013 by meena.p

1 answer

A particle is suspended from a spring and it stretches the spring by 1 cm on the surface of the earth. The same particle will stretch the same spring at a place 800 Km above the earth by

asked Aug 24, 2013 by meena.p

1 answer

The potential energy of a 1 kg mass free to move along the x-axis is given by $V_{(x)}=\bigg[\large\frac{x^4}{4}-\frac{x^2}{2}\bigg]$$J$ The total mechanical energy of the particle is $2J$ then the maximum speed is?

asked Aug 6, 2013 by meena.p

1 answer

Objects A and B each of mass m are connected by light inextensible cord. They are constrained to move on a frictionless ring in a vertical plane. The object is released from rest at the positions as shown. The tension T in the cord just after release will be

asked Jul 12, 2013 by meena.p

1 answer

Velocity versus displacement graph of a particle moving in a straight line is shown. corresponding acceleration versus velocity graph will be

asked Jul 1, 2013 by meena.p

1 answer

The area bounded by the parabola $y^{2}=x $ and its latus rectum is

asked May 22, 2013 by poojasapani_1

1 answer

If $-\overline{z}$ lies in the third quadrant then $z$ lies in the

asked May 12, 2013 by poojasapani_1

1 answer

Evaluate:$\int\limits _0 ^{\pi} \large\frac {x \sin x}{1+\cos ^2 x}$$dx$

asked Feb 3, 2013 by meena.p

1 answer

FInd the interval in which $f(x)=8+36x+3x^2-2x^3$ is increasing or decreasing.

asked Jan 29, 2013 by meena.p

0 answers

Which of the following is the general solution of $\large\frac{d^2y}{dx^2}$$-2\large\frac{dy}{dx}$$+y=0$

asked Jan 20, 2013 by sreemathi.v

1 answer

If two events are independent,then

asked Jan 10, 2013 by sreemathi.v

1 answer

Discuss the applicability of Rolle's theorem on the function given by $f(x)=\left \{\begin{array}{1 1}x^2+1, & if\;0\leq x\leq1\\3\;x, & if\;1<x<2\end{array}\right.$

asked Jan 2, 2013 by sreemathi.v

1 answer

The negative of a matrix is obtained by multiplying it by

asked Dec 24, 2012 by sreemathi.v

1 answer

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