Question

Тригонометрия!!!  очень срочно!! Найдите значение: в) tg 13пи/6 д) ctg 13пи/3 е) tg (-17пи/4) 

Answer 1

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.

Answer 2

в) tg 13π/6
tg 13π/6 = tg (π/6 + 2π) = tg(π/6) = 1/√3

д) ctg 13π/3
ctg 13π/3 = ctg (π/3 + 4π) = ctg(π/3) = √3

е) tg(-17π/4)
tg(-17π/4) = tg(-4π - π/4) = tg(-π/4) = -1