August 2022 1 15 Report

ПОМОГИТЕ ПОЖАЛУЙСТА, СРОЧНО, ПЛИИИЗ!!!

ДОКАЖИТЕ ТОЖДЕСТВО

1. sin2B - tgB = cos 2B tg B

2. ctg A - sin 2A = ctg A cos 2A

где В - это БЭТТА

где А - это АЛЬФА

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