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Byju's Answer
Standard IX
Mathematics
Calculating Heights and Distances
if X + iota Y...
Question
if X + iota Y is equal to 3 upon 2 + cos theta + iota sin theta then the value of x square + Y square is
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Q.
If
x
sin
3
θ
+
y
cos
3
θ
=
sin
θ
cos
θ
and
x
sin
θ
=
y
cos
θ
,
then
(
x
2
+
y
2
)
is equal to
Q.
Three parallel lines
ι
,
ι
2
a
n
d
ι
3
are drawn through the vertices A, B and C of a square ABCD If the distance between
ι
1
a
n
d
ι
2
is 7 and between
ι
2
a
n
d
ι
3
is 12, then the area of the square ABCD is
Q.
If
x
=
2
cos
θ
−
sin
θ
;
y
=
cos
θ
−
3
sin
θ
,
then the value of
(
3
x
−
y
)
2
+
(
x
−
2
y
)
2
is
Q.
If
x
sin
3
θ
+
y
cos
3
θ
=
sin
θ
cos
θ
and
x
sin
θ
=
y
cos
θ
. Find the value of
x
2
+
y
2
.
Q.
Value it :-
if
x
sin
3
θ
+
y
cos
3
θ
=
sin
θ
cos
θ
and
x
sin
θ
=
y
cos
θ
,prove that
x
2
+
y
2
=
1
.
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