Докажите тождество 4sin^4a - 4sin²a =-sin²2a.​

ЖЕДАЛЙАШОВАПРЫГНРМ ВППЦКП

Объяснение:

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Вероятность равна отношению числа благоприятных вариантов выбора к общему числу вариантов выбора 
Поскольку благоприятный вариант у нас состоит из выбора 2 королей и 16 других карт, то число благоприятных вариантов равно произведению числа сочетаний из 4 королей по 2 короля умножить на число сочетаний из 32 карт (не королей) по 16 карт. 
Общее число вариантов равно числу сочетаний из 36 карт по 18 карт. 
P=C(2,4)*C(16,32)/C(18,36) 
где С(m,n) - число сочетаний из n элементов по m. 
C(m,n)=n!/(m!*(n-m!)), ! -знак факториала. 
Получаем вероятность. 
P=4!/(2!*2!)*32!/(16!*16!)*18!*18!/36!=0,3974=39,74%