Предмет: Математика, автор: torivikulya1987

Упростить выражение синус квадрат альфа + косинус квадрат альфа - 3

Ответы

Автор ответа: sergeevaolga5

0

Ответ:

$-2$

Решение:

$sin^2a+cos^2a-3=(sin^2a+cos^2a)-3=1-3=-2$

Объяснение:

$sin^2a+cos^2a=1$ - это основное тригонометрическое тождество

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