Решить: sin^2(-330°)-cos^2(-120°)-tg^2(-240°)-ctg^2(-330°)=

sarmy8404 @sarmy8404

April 2023 1 15 Report

Решить:
sin^2(-330°)-cos^2(-120°)-tg^2(-240°)-ctg^2(-330°)=

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fenix6810 sin^2(-330°)-cos^2(-120°)-tg^2(-240°)-ctg^2(-330°)=
=sin^2(30)-cos^2(60)-tg^2(60)-ctg^2(30)=
=sin^2(30)-sin^2(30-2tg^2(60)=-6

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