Предмет: Алгебра, автор: Aselmahsut9

1)sina+3sin²a+3cos²a=?
2)cos²atg²a+5cos²a-1=?
a-альфа

Ответы

Автор ответа: pachkamilk

1

Ответ:

1. sinα + 3

2. -sin(atg²a)² + 5 cos²a

Объяснение:

1. 3sin²a+3cos²a = sin²a +cos²a= 1

в данном случае равно 3

2. -(1 - cos(atg²a)²) + 5 cos²a = - sin(atg²a)² + 5 cos²a

как-то так,мне кажется, ошибка во втором, но если нет, то вот так ;з

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