July 2022 1 10 Report

Помогите решить:

tg(π/4– 2x)≥1

2cos(x+π/3  )-√3  < 0 

sin2x/(1+ sinx)=-2cosx

1-cosx=sin x/2

√3/2  sin3x-  (1  )/2  cos3x=-1

 

 

 

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