Question

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

$sint=15/17\\tgt=15/8\\ctgt=8/15$

Пошаговое объяснение:

$cost=frac{8}{17},;;;0<t<frac{pi}{2}=>sint>0, tgt>0, ctgt>0\\sint=sqrt{1-cos^2t}=sqrt{1-(8/17)^2}=sqrt{1-64/289}=sqrt{225/289}=15/17\\tgt=sint:cost=(15/17):(8/17)=(15/17)*(17/8)=15/8\\ctgt=1/tgt=1:(15/8)=8/15$