Тригонометрия!!! очень срочно!!
Найдите значение:
в) tg 13пи/6
д) ctg 13пи/3
е) tg (-17пи/4)
tg(13π/6)=tg(2π+(π/6))=tg(π/6)=1/√3;
ctg(13π/3)=ctg(4π+(π/3))=ctg(π/3)=1/√3;
tg(-17π/4)=tg(-4π-(π/4))=tg(-π/4)=-tg(π/4)=-1.
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Answers & Comments
tg(13π/6)=tg(2π+(π/6))=tg(π/6)=1/√3;
ctg(13π/3)=ctg(4π+(π/3))=ctg(π/3)=1/√3;
tg(-17π/4)=tg(-4π-(π/4))=tg(-π/4)=-tg(π/4)=-1.