Question

Вычислить значение функции:

Answer 1

f(-7π/4) = sin(-2*7π/4) + 5cos(-4 * 7π/4) = sin(-7π/2) + 5cos(-7π) = sin(-7π/2 + 4π) + 5cos(-7π + 8π) = sin(π/2) + 5cos(π) = 1 - 5 = -4