Ответ учителя по предмету Алгебра
cos (п +2x )= -cos 2x
формули приведения
sin (3п-2x )= sin 2x
25cos (п +2x )sin (3п-2x )=0
25*(-cos 2x )*sin 2x =0
-12,5*2*cos 2x *sin 2x=0
-12,5*sin 4x=0
sin 4x=0
х=0, sin 0 =0
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2) Какой генотип имеет мужчина, дочь которого — дальтоник?
а) в Древнем Египте — _________________________________________
б) в Древнем Риме — __________________________________________