August 2022 1 3 Report
ПОМОГИТЕ ПОЖАЛУЙСТА РЕШИТЬ
Если [tex]ctg\alpha = 3[/tex] , то значение [tex]tg(\frac{\pi}{4} - 2\alpha)[/tex] равно

Варианты ответов:

1) [tex]\frac{1}{7}[/tex]
2) -3
3) 7
4) [tex]-\frac{1}{7}[/tex]
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