[latex]a) sin118^{o}=sin(180^o}-62^{o}) = sin62^{o} = 0,883\\b) cos149^{o} = cos(180^{o}-31^{o}) = -cos31^{o} =-0,875\\c) tg100^{o} = tg(90^{o}+10^{o}) = -ctg10^{o} = -5,671[/latex]