Question

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

Answer 1

Ответ:

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

Пошаговое объяснение:

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