CC_DEGRESS_TO_RADIANS was not declared in this scope

[amateur.jung8]

Hi.
I've got an error when I build project.

The error is this.

CC_DEGRESS_TO_RADIANS was not declared in this scope.

At the beginning of code, I inserted a row

#include "cocos2d.h"

What's the matter?
Why this error occured?

Also when I clicked the line " #include 'cocos2d.h' "
I must get into the cocos2d.h, but no result happen.