Ajutorrrrrr.....
SIN DE 15 GRADE =?
Pls ofer coroana


Răspuns :

sin15° =sin30°/2      
           = √ [(1-cos30°)/2]      
           = √[ (1-√3/2)/2]
           = √ [(2-√3)/4]

           ≈ 0.258