Tag: mathematics and statistics

Questions Related to mathematics and statistics

The focal chord to $y^{2}=16 x$ is tangent to $(x-6)^{2}+y^{2}=2$, then the possible values of the slope of this chord are:

  1. {-1,1}

  2. {-2,2}

  3. {-2,1/2}

  4. (2,-1/2}


Correct Option: A

The line equally inclined to the coordinate axes and equidistant from points A(1,-2) and B (3,4) is

  1. $x+y=2, x+y=3$

  2. $x-y=3, x-y=1$

  3. $x-y=1, x+y=3$

  4. $x+y=2, x-y=3$


Correct Option: A

A circle of radius 2 is concentric with ellipse $\frac{x^{2}}{7}+\frac{y^{2}}{3}=1$ then inclination of common tangent with x-axis - 

  1. $\frac{\pi }{2}$

  2. $\frac{\pi }{4}$

  3. $\frac{\pi }{3}$

  4. $\frac{\pi }{6}$


Correct Option: A

A straight line with negative slope passing the point (1, 4) meets the coordinate axes at A and B. The minimum value of OA + OB = 

  1. 5

  2. 6

  3. 9

  4. 8


Correct Option: A

If a straight line in space is equally inclined to the co-ordinate axes, the cosine of its angle of inclination to any of the axes is 

  1. $\dfrac{1}{3}$

  2. $\dfrac{1}{2}$

  3. $\dfrac{1}{\sqrt{3}}$

  4. $\dfrac{1}{\sqrt{2}}$


Correct Option: A

The line equally inclined to the coordinate axes and equidistant from points 
$A(1,-2)and B(3,4) is$

  1. $x+y=2, x+y =3$

  2. $x-y =3, x-y =1$

  3. $x-y=1, x+y =3$

  4. $x+y=2, x-3 =3$


Correct Option: B

the inclination of the tangent at$\theta =\frac { \pi  }{ 3 } on\quad the\quad curve\quad x=a\left( \theta +sin\theta  \right) ,y=a\left( 1+cos\theta  \right) is$

  1. $\frac { \pi }{ 3 }$

  2. $\frac { \pi }{ 6 }$

  3. $\frac { 2\pi }{ 3 }$

  4. $\frac { 5\pi }{ 3 }$


Correct Option: A

The side of a triangle are a. b and $\sqrt{a^2+ab+b^2}$. The greatest angle is 

  1. $90^0$

  2. $135^0$

  3. $120^0$

  4. none of these


Correct Option: A

The difference of the slopes of the lines represented by $x^ {2}(\tan^ {2}\theta+\cos^ {2}\theta)+2xy\tan\theta+y^ {2}\sin^ {2}\theta=0$ is

  1. $1$

  2. $2$

  3. $3$

  4. $4$


Correct Option: A

If the equations of the three sides of a triangle are $2x+3y=1$, $3x+2y+6=0$ and $x+y=1$, then the orthocentre of the triangle lies on the line 

  1. $13x+13y=1$

  2. $169x+26y=178$

  3. $169x+y=0$

  4. $none\,of\,these$


Correct Option: A