Question

Dau coroana!!!!!!!!!!!!!!!!!!!

Answer 1

Sin390°=sin (30+360)=sin30=1/2;
Cos390°=cos30=radicala din 3/2;
Tg390°=Tg30=Radical din 3/3;
Sin405=sin(45+360)=sin45=radical din 2/2;
Cos405=cos45=radical din 2/2;
Tg405=tg45=1;