Răspuns:
E1=-1
E2=1
Explicație pas cu pas:
sin250°=sin (180°+70°)= -sin70°
sin40°=sin(180°+40°)=-sin40°
deci E1=-1
tg205°=tg(180+25)°=tg25°
tg235°=tg(180+55)°=tg55°
atunci E2=1
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Răspuns:
E1=-1
E2=1
Explicație pas cu pas:
sin250°=sin (180°+70°)= -sin70°
sin40°=sin(180°+40°)=-sin40°
deci E1=-1
tg205°=tg(180+25)°=tg25°
tg235°=tg(180+55)°=tg55°
atunci E2=1