Докажите тождества ([email protected]...

Question

Докажите тождества
([email protected] [email protected])*([email protected])^[email protected]

Answer 1

Решите задачу:

Answer 2

(Sinα-tgα)·(cosα-1)⁻¹=tgα;
(sinα-tgα)·(cosα-1)⁻¹=(sinα-sinα/cosα)·1/(cosα-1)=
=(sinα·cosα-sinα)/[cosα(cosα-1)]=[sinα(cosα-1)]/[cosα(cosα-1)]=
=sinα/cosα=tgα