Объяснение:
Sin105⁰Cos15⁰ + Sin15⁰Sin165⁰ + tg(-225⁰) = Sin(90⁰ + 15⁰)Cos15⁰ +
+ Sin15⁰Sin(180⁰ - 15⁰) + tg(-180⁰ - 45⁰) = Cos15⁰Cos15⁰ + Sin15⁰Sin15⁰ + (-tg45⁰) =
= (Cos²15⁰ + Sin²15⁰) + (-tg45⁰) = 1 + (-1) = 0
