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vipslesaryuk
@vipslesaryuk
July 2022
1
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Упростить выражение:
Ctga*sin(-a)-cos(-a)
1-sin^2(-x)/cosx
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113020021
Ctga×sin (-a)-cos (-a)= cosa/sina×(-sina)-cosa=-cosa-cosa=-2cosa
1-sin^2x=cos^2x, cos^2x/ cosx= cosx
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Answers & Comments
1-sin^2x=cos^2x, cos^2x/ cosx= cosx