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memmori999
@memmori999
July 2022
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ctgx=0,5; tg(П/4-x)=?
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vitaliycska90
=(tgП/4-tgx)/(1-tgП/4*tgx)=(1-tgx)/(1+tgx)=?
По триг.т. ctgx*tgx=1, значит tgx=1/ctgx => tgx=1/0,5=1/(1/2)=1*2=2, tgx=2
Подставляем в (1-tgx)/(1+tgx), получается
(1-2)/(1+2)=-1/3
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Answers & Comments
По триг.т. ctgx*tgx=1, значит tgx=1/ctgx => tgx=1/0,5=1/(1/2)=1*2=2, tgx=2
Подставляем в (1-tgx)/(1+tgx), получается
(1-2)/(1+2)=-1/3