Предмет: Алгебра, автор: blurryface6277

ОЧЕНЬ СРОЧНО! упростить выражение cos^2t+sin^2t/tgt*ctgt

Ответы

Автор ответа: rubilovalex

0

cos^2t+sin^2t=1(основное тригонометрическое тождество). tgt* ctgt= sint/cost* cost/sint=1. получаем : 1/1=1. Ответ: 1.

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