<span>A shape has Rotational Symmetry when it still looks the same after a rotation.</span>
        
             
        
        
        
Can you take a better pic i cant see the whole problem
        
             
        
        
        
Answer:
sin⁴x - sin²x
sin²x(sin²x - 1)
(1 - cos²x)(1 - cos²x - 1)
(1 - cos²x)(-cos²x)
-cos²x + cos⁴x
cos⁴x - cos²x