Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
5
6
p
i
1
6
p
i
s
i
n
x
s
i
n
4
x
-
s
i
n
2
x
+
c
o
s
x
c
o
s
4
x
+
c
o
s
2
x
d
x
Math Input
Natural Language
Math Input
