2) (cos105cos5+sin105cos(90-5))/(sin(90+105)cos5+cos(90+105sin(180+5))=
=(cos105cos5+sin105sin5)/(cos105cos5+sin105sin5)=cos100/cos100=1
2) (cos105cos5+sin105cos(90-5))/(sin(90+105)cos5+cos(90+105sin(180+5))=
=(cos105cos5+sin105sin5)/(cos105cos5+sin105sin5)=cos100/cos100=1