View Compilation Error

0_0_33197812_15092.cpp: In function 'Vector Rotate(Vector, double)':
0_0_33197812_15092.cpp:19:29: error: 'r' was not declared in this scope
     return Vector(A.x * cos(r
                             ^
0_0_33197812_15092.cpp:19:29: error: expected ';' at end of input
0_0_33197812_15092.cpp:19:29: error: expected '}' at end of input