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Mathematics
Problem
Evaluate
∫
cos
2
2
x
d
x
\displaystyle\int \cos^2 2x\,dx
∫
cos
2
2
x
d
x
. a)
x
+
sin
4
x
8
+
C
x+\dfrac{\sin 4x}{8}+C
x
+
8
sin
4
x
+
C
b)
x
+
sin
4
x
4
+
C
x+\dfrac{\sin 4x}{4}+C
x
+
4
sin
4
x
+
C
c)
x
2
+
sin
4
x
8
+
C
\dfrac{x}{2}+\dfrac{\sin 4x}{8}+C
2
x
+
8
sin
4
x
+
C
d)
x
2
+
sin
4
x
4
+
C
\dfrac{x}{2}+\dfrac{\sin 4x}{4}+C
2
x
+
4
sin
4
x
+
C
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