Find the area enclosed by the ellipse
x
=
a
cos
(
t
)
\displaystyle {x}={a}{\cos{{\left({t}\right)}}}
x
=
a
cos
(
t
)
,
y
=
b
sin
(
t
)
\displaystyle {y}={b}{\sin{{\left({t}\right)}}}
y
=
b
sin
(
t
)
with
0
≤
t
≤
2
π
\displaystyle {0}\le{t}\le{2}\pi
0
≤
t
≤
2
π
.
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