Odpowiedź:
Szczegółowe wyjaśnienie:
180º = π, 45º = π/4, 60º = π/3.
(cos 30° + 45°)(60° − 45°) = (√3/2 + π/4)(π/3 - π/4) =
= (√3/2 + π/4)(4π/12 - 3π/12) = (√3/2 + π/4)(π/12) =
= (√3 + π/2)(π/12)•1/2 = π/24)•(√3 + π/2)
