July 2022 2 12 Report

ПОМОГИТЕ ПОЖАЛУЙСТА:

Упростите выражения:

 

1) 2tga - tg(a-П)- ctg(a -(3П/2))=

2) (tg(270-a)* sin130*cos320*sin270)/ (ctg(180-a)*cos50* sin220*cos360)=

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