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Athul Vincent
Subject: Maths
, asked on 9/12/17
Prove that equation of tangent at 't' is ty=at^2
Answer
1
Ekta Ray
Subject: Maths
, asked on 9/12/17
Pls.solve this
Answer
1
Anushka Agrawal
Subject: Maths
, asked on 9/12/17
Please answer question no 5
Answer
1
Athul Vincent
Subject: Maths
, asked on 8/12/17
"Let y2?= 4ax be the equation of a parabola and (x1, y1) an external point P. Then, equation of the tangents is given by
SS1?= T2,?where S = y2?? 4ax, S1?= y12?? 4ax1, T = yy1?? 2a(x + x1)"
How is the equation tangent given by SS1=T^2 ?
Answer
2
Vibhansh Agarwal
Subject: Maths
, asked on 6/12/17
show that the angle between the tangents to the ellipse b^2 x^2 + a^2 y^2 = a^2 b^2 and the circle x^2 + y^2 = ab at their point of intersection is tan ^-1 (a-b)/ sqrt (ab)
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 6/12/17
show that the feet of the perpendicular from the foci upon any tangent to the ellipse b^2 x^2 + a^2 y^2 = a^2 b^2 lie on the auxiliary circle of the ellipse
Answer
1
Athul Vincent
Subject: Maths
, asked on 5/12/17
Solve this:
iv) The extremities of a diagonal of a rectangle are
-
4
,
4
a
n
d
6
,
-
1
. A circle circumscribe the rectangle and cuts an intercept AB on the y-axis. Find the area of the triangle formed by AB and the tangents to the circle at A and B.
Answer
1
Prakhar Asaiya
Subject: Maths
, asked on 4/12/17
Find the centre of circle of smallest radius which touches x
2
+y
2
-2y-3=0 and x
2
+y
2
-8x-18y+93=0 externally.
Answer
1
Bhavi Sibal
Subject: Maths
, asked on 3/12/17
the center of ellipse 3(2x+y-3)^2+ 4(x-2y+5)^2=12 ?
Answer
1
Poorvi
Subject: Maths
, asked on 2/12/17
e= c/a
Answer
3
Tushar
Subject: Maths
, asked on 27/11/17
How do we get point 5/2 ,-10
Answer
1
Vanshika Sharma
Subject: Maths
, asked on 15/11/17
Q. Find the equations of the chords of the parabola y
2
= 4ax which pass through the point (-6a,0) and which subtends an angle of 45
°
at the vertex.
Answer
1
Manju Manikandan
Subject: Maths
, asked on 14/11/17
Find an equation of the parabola with focus at (0,4) and vertex at (0,0)
Answer
1
Arshia Sharma
Subject: Maths
, asked on 12/11/17
Plz give me diagram of ques7
Q7. The equation of the circle passing through the point (1 , 1) and having two diameters along the pair of lines
x
2
–
y
2
– 2
x
+ 4
y
– 3 = 0 , is
(a)
x
2
+
y
2
– 2
x
– 4
y
+ 4 = 0 (b)
x
2
+
y
2
+ 2
x
+ 4
y
– 4 = 0
(c)
x
2
+
y
2
– 2
x
+ 4
y
+ 4 = 0 (d) none of these
Answer
1
Arshia Sharma
Subject: Maths
, asked on 12/11/17
Ques 22
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x
a
m
p
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e
22
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T
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l
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c
u
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f
t
h
e
m
i
d
d
l
e
p
o
i
n
t
s
o
f
t
h
e
c
h
o
r
d
s
o
f
t
h
e
c
i
r
c
l
e
x
2
+
y
2
=
4
a
2
w
h
i
c
h
s
u
b
t
e
n
d
a
r
i
g
h
t
a
n
g
l
e
a
t
t
h
e
c
e
n
t
r
e
o
f
t
h
e
c
i
r
c
l
e
i
s
(
a
)
x
+
y
=
2
a
(
b
)
x
2
+
y
2
=
a
2
(
c
)
x
2
+
y
2
=
2
a
2
(
d
)
x
2
+
y
2
=
x
+
y
Answer
1
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What are you looking for?
SS1?= T2,?where S = y2?? 4ax, S1?= y12?? 4ax1, T = yy1?? 2a(x + x1)"
How is the equation tangent given by SS1=T^2 ?
iv) The extremities of a diagonal of a rectangle are . A circle circumscribe the rectangle and cuts an intercept AB on the y-axis. Find the area of the triangle formed by AB and the tangents to the circle at A and B.
Q7. The equation of the circle passing through the point (1 , 1) and having two diameters along the pair of lines x2 – y2 – 2x + 4y – 3 = 0 , is
(a) x2 + y2 – 2x – 4y + 4 = 0 (b) x2 + y2 + 2x + 4y – 4 = 0
(c) x2 + y2 – 2x + 4y + 4 = 0 (d) none of these