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.
y
'
'
+
y
-
c
o
s
x
=
0
,
y
0
=
1
,
y
1
0
=
-
0
.
5
Math Input
Natural Language
Math Input