Evaluate the integral
∫
s
i
n
2
x
d
x
Question 4Select one:
-
cos
x
+
2
3
c
o
s
3
x
-
1
5
c
o
s
5
x
+
c
-
sin
x
+
2
3
s
i
n
3
x
-
1
5
s
i
n
5
x
+
c
sin
x
-
2
3
s
i
n
3
x
+
1
5
s
i
n
5
x
+
c
cos
x
-
2
3
c
o
s
3
x
+
1
5
c
o
s
5
x
+
c
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