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Mathematics
Mathematics
Problem
If
(
a
,
0
)
(a, 0)
(
a
,
0
)
;
a
>
0
a > 0
a
>
0
is the point where the curve
y
=
sin
2
x
−
3
sin
x
y = \sin 2x - \sqrt{3} \sin x
y
=
sin
2
x
−
3
sin
x
cuts the
X
X
X
-axis first,
A
A
A
is the area bounded by this part of the curve, the origin and the positive
X
X
X
-axis, then a.
4
A
+
8
cos
a
=
7
4A + 8 \cos a = 7
4
A
+
8
cos
a
=
7
b.
4
A
+
8
sin
a
=
7
4A + 8 \sin a = 7
4
A
+
8
sin
a
=
7
c.
4
A
−
8
sin
a
=
7
4A - 8 \sin a = 7
4
A
−
8
sin
a
=
7
d.
4
A
−
8
cos
a
=
7
4A - 8 \cos a = 7
4
A
−
8
cos
a
=
7
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