Question

Помогите решить, пожалуйста!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1) sina=√2/3

cosa=√(1-(√2/3)²)=√(7)/3

tga=sina/cosa=√2/3×3/√7=√(14)/7

ctga=cosa/sina=√(7)/3×3/√2=√(14)/2

2) cosa=15/17

sina=√(1-(15/17)²)=-8/17

tga=sina/cosa=-8/17×17/15=8/15

ctga=cosa/sina=15/17×(-17/8)=15/8