В) у (0)= √0= 0
у(1)= √ (5-1)= √4 = 2
у(2)= √(10-1) = √9 = 3
г ) f(-π/4)= 2+1= 3
f(0)= 2-0= 2
f(5π/12)= 2- sin 5π/12= 2-1/2 = 3/2
а) у(-π/4)= 3cos (-π/2)= 3 cos π/2 косинус поглощает знак . и у = 0 .
у(0) = 3 cos(-π/4) = 3 cos π/4= 3√2/2
y(π) = 3 cos( π-π/4)= 3 cos 3π\4= -3cos π/4 = -3√2/2