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Recent questions tagged q1-8

'The sum of all interior angles of a triangle is $180^\circ$.' Is this sentence a statement? Give reason.

asked Jul 4, 2014 by rvidyagovindarajan_1

1 answer

Using differentials, find the approximate value of each of the following up to $3$ places of decimal. $(255)^{\Large\frac{1}{4}}$

asked Aug 5, 2013 by sreemathi.v

1 answer

Evaluate the limit for the following if exists. $\;\lim\limits_{x \to 0} \large\frac{\cot x}{\cot 2x}$

asked May 6, 2013 by poojasapani_1

1 answer

Integrate : $\int\large\frac{1+\tan^2x}{\sqrt{1+\tan^2x}}\normalsize dx$.

asked Apr 18, 2013 by sreemathi.v

0 answers

A performance test was conducted among seven candidates.They scored the following marks : 7,10,12,15,17,19,25.Calculate the interquartile range and the standard deviation.

asked Apr 17, 2013 by sreemathi.v

0 answers

One set of 100 observations has the mean as 15 and another set of 150 observations has the mean as 16.Find the mean of 250 observations by combining the two sets of given observations.

asked Apr 16, 2013 by sreemathi.v

1 answer

Five students scored marks as follows : 8,10,15,20,22.

asked Apr 16, 2013 by sreemathi.v

0 answers

In a standard deviation of the numbers,2,3,11 and x is $3\large\frac{1}{2}$,find the value of $x$.

asked Apr 15, 2013 by sreemathi.v

0 answers

Find the order and degree of the following differential equation: $y'+ (y'')^{2}$=$ x( x+y'' )^{2}$

asked Apr 14, 2013 by poojasapani_1

1 answer

The mean weight of 70 students in a class is 60 kg.The mean weight of the girls in the class is 53 kg and that of the boys is 70.5 kg.Find the number of girls in the class.

asked Apr 12, 2013 by sreemathi.v

0 answers

If the regression equation of $x$ on $y$ is given by $mx-y+10=0$ and the equation of $y$ on $x$ is given by $-2x+5y=14$,determine the value of 'm' if the coefficient of correlation between $x$ and $y$ is $\large\frac{1}{\sqrt {10}}$.

asked Apr 11, 2013 by sreemathi.v

1 answer

Find the equation of the hyperbola if centre : $(1 , 4 );$one of the foci $(6 , 4 )$ and the corresponding directrix is $x=\large\frac{9}{4}$

asked Apr 11, 2013 by poojasapani_1

1 answer

Find the modulus and argument of the complex number $\large \frac{2+i}{4i+(1+i)^2}$

asked Apr 11, 2013 by sreemathi.v

0 answers

Find the equation of the ellipse if the foci are $(\pm 3 , 0 ),$ and the length of the latus rectum is $\large\frac{32}{5}$

asked Apr 10, 2013 by poojasapani_1

1 answer

Evaluate : $\Large \int_1^2 \frac{\sqrt x}{\sqrt{3-x}+\sqrt x}\normalsize dx.$

asked Apr 10, 2013 by sreemathi.v

0 answers

Find the equation of parabola if :Vertex $(3 , -1 );$ open rightward ; the distance between the latus recturm and directrix is $4$.

asked Apr 9, 2013 by poojasapani_1

1 answer

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