Ответ:

Решение:

sin (3π/4) * cos (π/12) + cos (3π/4) * sin (π/12) = sin (3π/4 + π/12) =

3π/4 + π/12 = (3π * 3 + π)/12 = (9π + π)/12 = 10π/12 = 5π/6

sin (3π/4 + π/12) = sin (10π/12) = sin (5π/6)

sin (5π/6) = sin (π - π/6) = sin π/6 = 1/2

Заполним пропуски:

  • sin (3π/4) * cos (π/12) + cos (3π/4) * sin (π/12) = sin (3π/4 + π/12)
  • sin (3π/4 + π/12) = sin 10π/12
  • sin (10π/12) = sin (5π/6)
  • sin (5π/6) = sin (6π/6 - π/6)
  • sin (6π/6 - π/6) = sin (π/6) = sin π/2

Ответ: π/12; 10π; 6; π; π/6