РЕШИТЕ ПРИМЕРЫ ПОЖАЛУЙСТА!!!(КАКИЕ СМОЖЕТЕ) 1)sin15cos15-cos15sin5=
2)cos15cos5+sin15sin5=
3)cos15sin5+sin15cos5=
4)tg18+tg48/1-tg18tg12=
5)tg18-tg48/1+tg18tg48=
6)1-tg18tg12/tg18+tg12=
7)sin(α+β)+sin(α+β)=
8)cos(α+β)+cos(α-β)=
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