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Syllabus

Find the equation of the common tangent of parabola y

^{2}=4ax and x^{2}=4by.Show that the semi latus rectum of the parabola y

^{2}= 4ax is a harmonic mean between the segment of any focal chord.QFind the equation of the hyperbola with centre as the origin, transverse axis along x - axis, ecentricity √5 and the sum of whose semi - axes is 9.an equilateral triangle is inscribed in the parabola y

^{2}=4ax,where one vertex is at the vertex of the parabola.find the length of the side of the triangle.pls answer me as soon as possible.1)

if parabola y^{2}=px passes through point (2,-3),find the length of latus rectum .2) find the value of p so that the equation x^{2}+y^{2}- 2px+ 4y - 12=0 may represent a circle of radius 5 units .3) one end of the diameter of a circle x2+y2-6x+5y-7=0 os (7,-8).find the co-ordinates of other end

The focus of parabola is (1,5) and its directrix is x + y + 2 = 0. Find the equation of the parabola, its vertex and length of latus rectum.

the line lx + my +n=0 is a normal to the parabola y^2 = 4ax if

find the equation of the circle circumscribing the triangle formed by the lines x + y = 6, 2x + y = 4 and x + 2y = 5

Let S1 = x^{2}+y^{2}-4x-8y+4=0 and S2 be its image in the line y=x , find the equation of circle touching y=x at (1,1) and its radical axes with S2 passes through the centre of S1^{2}+2y -3x +5 =0.find the locus of the mid point of the portion of the line x cosa +yp sin a = p which is intercepted between the axis ??

Find the equation of the circle which has its centre at the point (3,4) and touches the straight the line 5x+12y-1=0.

Find the equqtion of the circle which touches the axes and whose centre lies on x-2y=3.

A circle whose centre is the point of the intersection of the lines 2x-3y+4=0 and 3x+4y-5=0 passes through the origin. find its equation.

A circle of radius 4 units touches the coordinate axes in the first quadrant. Find the equation of its images with respect to the line mirrors x=0 and y=0.

One diameter of the circle circumscribing the rectangle ABCD is 4y=x+7. If the coordinates of A and B are (-3,4) and (5,4) respectively. Find its equation.

find the focus and equation of parabola whose vertex is (6,-3) and diretrix is 3x - 5y + 1 = 0.

Find the equations of circle passing through the points (1,1),(2,2) and whose radius is 1 units?

Calculate the coordinates of the foot of perpendicular from the point (-4,2) to the line 3x + 2y = 5. also find the equation of the smallest circle passing through (-4,2) and having its centre on the line 3x + 2y = 5

Prove that (-1,6), (5,2), (7,0), and (-1,-4) are concyclic.

e

if y = 2x is a chord of the circle x

^{2}+ y^{2}- 10x =0find the equation of the circle with this chord as diameter

2. Consider the circle x

^{2}+ y^{2}- 8x - 18y + 93 = 0 with cantre 'C' and are point P( 2, 5 ) outside it. From the point P, a pairof tangents PQ and PR are drawn to the circle with S as the midpoint of QR.

The line joining P to C intersects the given circle at A and B Which of the following hold(s) good?

(A) CP is the arithmetic mean of AP and BP.

(B) PR is the geometric mean of PS and PC.

(C) PS us the harmonic mean of PA and PB.

(D) The angle between the two tangents from P is tan

^{-1}$\left(\frac{3}{4}\right).$The centre of a circle passing through the points (0,0) & (1,0) & touching the circle x2+y2=9 is: ans is (1/2 , +-root2)..explainAB is a chord of circle x2+y2=25 . The tangents of A & B intersect at C. If (2,3) is the mid-point of AB , the area of quadrilateral OACB is:ams is 50root (3/13) plzz explain3. Extremities of a dagonal of a rectangle are (0,0) & (4,3).Find the equations of the tangents to the circumcentre ofthe reactangle which are parallel to this diagonal.4. Find the equ. of circle described on the common cord of the circles x2+y2-4x-5=0 & x2+y2+8y+7=0 as diameter.ans is x2+y2-2x+4y+1=0..explain.find the equation of the circle concentric with the circles x^2 + y^2 -4x +6y-3=0 and of double its (1) circumference (2) area

The parametric equations of a parabola are x=t

^{2}+1, y=2t+1.The cartesian equation of its directrix isa) x=0 b)x+1=0 c)y=0 d) none of these

find the vertex, focus, diretrix and length of latus-rectum of the parabola

^{2}- 4y - 2x - 8 = 0^{2}+ 3y - 4x -3 = 0^{2}- 16x - 12y - 57 = 0if vertex is at (6,-3),& directrix is 3x-5y+1=0,find focus &equation of parabola

find the equation of the circle passing through origin and cutting off intercepts a and b from x axis and y axis

one diameter of the circle circumscribing the rectangle ABCD is 4y=x+7.If the coordinates of A & B are (-3,4) &(5,4) respectively , find the equation of the circle.

Find the standard equation of ellipse whose focus is (1,0), the directrix is x+y+1=0 and eccentricity is 1/root2

A circle of constant radius 'a' passes through origin 'O' and cuts the coordinate axes in points P and Q, then the equation of the locus of the foot of perpendicular from O to PQ is

(a) (x^2+y^2)(1/x^2+1/y^2)=4a^2

(b) (x^2+y^2)(1/x^2+1/y^2)=a^2

(c) (x^2+y^2)^2(1/x^2+1/y^2)=4a^2

(d) (x^2+y^2)(1/x^2+1/y^2)=a^2

In case of parabola

y= x

^{2}-2x-3Find:

a)Vertex:

b)Axis:

c)Focus:

d)Directrix:

e)Latus Rectum:

a tangent to the ellipse x

^{2}+ 4y^{2}=4 meets the ellipse x^{2}+2y^{2}=6 at P and Q.the angle between the tangents at P and Q of the ellipse x^{2}+2y^{2}=6if the line 2x - y +1 = 0 touches the circle at the point (2,5) and the center of the circle lies on the line x+y -9 =0 find the eqn of circle

^{2}/ 4 ) + ( y^{2}/9 ) .the tangent to curv y= x^2 + 6 at a point 1,7 touches the circle x^2+y^2+16x+12y+c=0 at a point q then the coordinates of q are :

ans = -6,-7

^{2}+y^{2}-6x+4y-36=0 represents a circle.Also find its centre and radius.Find the equation of the circle passing through the points (4, 1) and (6, 5) and whose centre is on the line 4

x+y= 16.A tangent to the ellipse 4x2+9y2=36 is cut by the tangent at the extremities of the major axis at T and T'. The circle on TT' as diameter passes through the point

(A) (0-$\sqrt{}$5) (B) ( $\sqrt{}$ 5, 0 )

(C) (0,0) (D) (3,2)

The foci of a hyperbola coincide with the foci of the ellipse x2/25 + y2/9=1.Find the equation of the hyperbola,if its eccentricity is 2.

if the chord of contact of tangents from a point P(h,k) to the circle x^{2}+ y^{2}= a^{2}touches the circle x^{2}+ (y-a)^{2}= a^{2}, then locus of P isThe equations of the tangents drawn from the origin to the circle x

^{2}+ y^{2}- 2rx- 2hy + h^{2}=0 are :^{2}-r^{2})x-2rhy=0, x=0^{2}-r^{2})x + 2rhy=0,x=0.Find the equation of the hyperbola having its foci at (0,root14) and (0,-root14) and passing through the point P(3,4)...

how can we derive standard equation of ellipse

Find the equation of parabola :

vertex =(2,1)

directrix : x = y-1

find the equation of ellipse .the distance between foci is 8 unit and the distance between directrix is 18 units.

(A) straight line parallel to x-axis (B) straight line parallel to y-axis

(C) circle of radius sq.rt.2 (D) circle of radius sq.rt.3

Please do this question both by Maxima and minima and simple method . Please please please do it by both the methods . Do not forget to do it by both the methods .

if the focus of a parabola is (-2,1) and equation of the directrix is x+y=3, find the vertex of the parabola

A man running a race course notes that the sum of the distances from the two flag posts from him is always 10m and the distance between the flag posts is 8 metres. Find the equation of the path traced by the man.

If P(-3,2) is one end of the focal chord PQ of the parabolay^2+4x+4y=0, then the slope of the normal at Q iswrite the equation of the axis of the parabola Y

^{2}= 16x ?the angle subtended by common tangents of two ellipses 4(x-4)

^{2 }+25y^{2}=100 4(x+1)^{2}+ y^{2}=4 at the origin (in degrees) isprove that the centres of the three circles x^2+y^2-4x-6y-12=0, x^2+y^2+2x+4y-5=0 and x^2+y^2-10x-16y+7=0 are collinear

find the equation of circle whose centre is the point of intersection of the lines 2x-3y+4=0 and 3x+4y-5=0 passes through the origin.

find the equation of circle which passes through the centre of the circle x

^{2}+y^{2}-4x-8y-41=0 and is concentric with x^{2}+y^{2}-2y+1=0prove tht points (2,-4)(3,-1)(3,-3)(0, 0)are concyclic

answer fast.urgent

_{1}^{2},2at_{1}) , (at_{2}^{2},2at_{2}) on the parabola y^{2}=4ax are at right angles if______{1}t_{2}= -2_{1}t_{2}= 1_{1}t_{2}= 2_{1}t_{2 }= -1what is co-axial circle how to determine its equation and also tell its figure

Show that the circle on the chord xcosα + ysinα - p = 0 of the circle x

^{2}+y^{2}= a^{2}as diameter is x^{2}+ y^{2}- a^{2}-2p(xcosα +ysinα -p)=03x-4y+1=0 at (1,1) and having radius 10 unit.

^{2}+y^{2}-4x=0 which is bisected at the point (1,1).{Please mention the requires formula in details)

Find the distance between the chords of contact of the tangent to the circle x

^{2 }+y^{2 }+2gx+2fy+c=0 from the origin and the point (g,f) .x^{2}+y^{2}= 25 intercepts chords of length 8 units have equations(a) $2x+3y=13,x+5y=17$

(b) $y=3,12x+5y=39$

(c) $x=2,9x-11y=51$

(d) none of these

A circle of radius 2 lies in the first quadrant and touches both the axis.Find the equation of the circle with the centre at (6,5) and touching the above circle externally.

If P is any point on hyperbola whose axis are equal,prove that SP.S'P=CP

^{2 }?Find the equation of the circle with radius 5 whose centre lies on x-axis & passes through the point (2,3)?

find equation of image of circle whose equation is x

^{2}+y^{2}+8x-16y+64=0 in the line mirror x=0