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Standard XII
Mathematics
Question
If
x
=
8
cos
3
θ
and
y
=
8
sin
3
θ
,
then
x
2
/
3
+
y
2
/
3
=
2
4
8
1
A
2
B
4
C
8
D
1
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Solution
Verified by Toppr
The correct option is
B
4
b'
x
2
/
3
=
8
2
/
3
(
cos
3
θ
)
2
/
3
=
4
cos
2
θ
y
3
/
2
=
8
2
/
3
(
sin
3
θ
)
2
/
3
=
4
sin
2
θ
x
2
/
3
+
y
2
/
3
=
4
(
sin
2
θ
+
cos
2
θ
)
=
4
'
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2
Similar Questions
Q1
If
x
=
8
cos
3
θ
and
y
=
8
sin
3
θ
,
then
x
2
/
3
+
y
2
/
3
=
View Solution
Q2
If
x
2
+
y
2
−
x
y
=
3
and
y
−
x
=
1
then find
x
y
x
2
+
y
2
.
View Solution
Q3
If
x
2
−
y
2
=
18
and
x
−
y
=
3
, then
4
x
y
=
_____.
View Solution
Q4
If
x
+
y
=
3
and
x
2
+
y
2
=
5
, then find xy.
View Solution
Q5
If
x
=
√
3
+
2
√
3
−
2
,
y
=
√
3
−
√
2
√
3
+
√
2
, then find
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2
+
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View Solution