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Amitesh Kumar
Subject: Maths
, asked on 31/1/18
Q.):- Find the equation of the chord of the circle
x
2
+
y
2
=
r
2
passing through the point (2, 3) farthest from the centre.
Answer
1
Amitesh Kumar
Subject: Maths
, asked on 31/1/18
Example.57.
Find the locus of middle points of chords of the circle
x
2
+
y
2
=
a
2
, which subtend right angle at the point (c, 0).
Answer
1
Harshraj Gupta
Subject: Maths
, asked on 26/1/18
Q 3,4
Answer
2
Harshraj Gupta
Subject: Maths
, asked on 26/1/18
Tll q 3,4
Answer
1
Naga Nandhini
Subject: Maths
, asked on 22/1/18
find the equation of circle ,2x2+2y2-x=0
Answer
2
Divyansh Saxena
Subject: Maths
, asked on 20/1/18
Q
.
T
h
e
l
e
n
g
t
h
o
f
t
h
e
tan
g
e
n
t
s
f
r
o
m
a
n
y
p
o
i
n
t
o
n
t
h
e
c
i
r
c
l
e
15
x
2
+
15
y
2
-
48
x
+
64
y
=
0
t
o
t
h
e
t
w
o
c
i
r
c
l
e
s
5
x
2
+
5
y
2
-
24
x
+
32
y
+
75
=
0
a
n
d
5
x
2
+
5
y
2
-
48
x
+
64
y
+
300
=
0
a
r
e
i
n
t
h
e
r
a
t
i
o
1
1
:
2
2
2
:
3
3
3
:
4
4
n
o
n
e
o
f
t
h
e
s
e
Answer
0
Divyansh Saxena
Subject: Maths
, asked on 20/1/18
Q
.
T
h
e
tan
g
e
n
t
l
i
n
e
s
t
o
t
h
e
c
i
r
c
l
e
x
2
+
y
2
-
6
x
+
4
y
=
12
w
h
i
c
h
a
r
e
p
a
r
a
l
l
e
t
o
t
h
e
l
i
n
e
4
x
+
3
y
+
5
=
0
a
r
e
g
i
v
e
n
b
y
:
1
4
x
+
3
y
-
7
=
0
,
4
x
+
3
y
+
15
=
0
2
4
x
+
3
y
-
31
=
0
,
4
x
+
3
y
+
19
=
0
3
4
x
+
3
y
-
17
=
0
,
4
x
+
3
y
+
13
=
0
4
n
o
n
e
o
f
t
h
e
s
e
Answer
0
Divyansh Saxena
Subject: Maths
, asked on 20/1/18
Q
.
F
i
n
d
t
h
e
c
o
-
o
r
d
i
n
a
t
e
s
o
f
p
o
i
n
t
o
n
l
i
n
e
x
+
y
=
-
13
,
n
e
a
r
e
s
t
t
o
t
h
e
c
i
r
c
l
e
x
2
+
y
2
+
4
x
+
6
y
-
5
=
0
1
-
6
,
-
7
2
-
15
,
2
3
-
5
,
-
6
4
-
7
,
-
6
Answer
0
Dharunika Vijayakumar
Subject: Maths
, asked on 17/1/18
6
.
I
f
P
i
s
a
p
o
i
n
t
o
n
t
h
e
e
l
l
i
p
s
e
x
2
16
+
y
2
25
=
1
w
h
o
s
e
f
o
c
i
a
r
e
S
a
n
d
S
'
,
t
h
e
n
f
i
n
d
t
h
e
v
a
l
u
e
o
f
P
S
+
P
S
'
.
(Answer:- PS+PS'=2a Ans. 10)
Answer
3
Rishika Malhotra
Subject: Maths
, asked on 9/1/18
What is the equation of this parabola?
Answer
1
Pragati Gupta
Subject: Maths
, asked on 9/1/18
the chords of contact of pair of tangents to circle x
2
+y
2
=1 drawn from any point on line 2x+y=4 pass through the pt (h,k) . find this pt (h,k)
Answer
1
Pragati Gupta
Subject: Maths
, asked on 8/1/18
6
.
T
a
n
g
e
n
t
s
O
P
a
n
d
O
Q
a
r
e
d
r
a
w
n
f
r
o
m
t
h
e
o
r
i
g
i
n
O
t
o
t
h
e
c
i
r
c
l
e
x
2
+
y
2
+
2
g
x
+
2
f
y
+
c
=
0
.
T
h
e
n
t
h
e
e
q
u
a
t
i
o
n
c
i
r
c
u
m
c
i
r
c
l
e
o
f
t
h
e
t
r
i
a
n
g
l
e
O
P
Q
i
s
:
(
A
)
x
2
+
y
2
+
2
g
x
+
2
f
y
=
0
(
B
)
x
2
+
y
2
+
g
x
+
f
y
=
0
(
C
)
x
2
+
y
2
-
g
x
-
f
y
=
0
(
D
)
x
2
+
y
2
-
2
g
x
-
2
f
y
=
0
Answer
0
Krithikha B
Subject: Maths
, asked on 2/1/18
.Find the equation of the parabola whose vertex is at ( 2, 1 ) and the directrix is x = y – 1
Answer
1
Sarthak Manojkumar Jaiswal
Subject: Maths
, asked on 31/12/17
From a point P tangent is drawn to the circle x
2
+y
2
=a
2
tangent is drawn to the circle x
2
+y
2
=b
2
.If these tangent are perpendicular ,then locus of P is :
(A)x
2
+y
2
=a
2
+b
2
(B)x
2
+y
2
=a
2
- b
2
(C)x
2
+y
2
=(a
b)
2
(D)x
2
+y
2
=a+b
Answer
1
Chetan
Subject: Maths
, asked on 27/12/17
find equation of circle which passes through (7,3) and centre lies on the line y=x-1 and has radius 3 units
Answer
1
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What are you looking for?
(Answer:- PS+PS'=2a Ans. 10)
(A)x2+y2=a2+b2
(B)x2+y2=a2- b2
(C)x2+y2=(ab)2
(D)x2+y2=a+b