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1)sin(arctg2+arctg3)=
2)sin(2arcsin1/3)+cos(arctg2√3)=
3)tg(arcsin1/3+arccos1/4)=
1)sin(arctg2+arctg3)=
2)sin(2arcsin1/3)+cos(arctg2√3)=
3)tg(arcsin1/3+arccos1/4)=
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