Question

f(x)=3-2sinx

найти d(f), e(f)

Answer 1

f(x)=F'(x)=(3-2sin(x))'=-2cos(x)
D(f): x∈R

E(f): 
-1≤cos(x)≤1
-1*-2≥-2cos(x)≥1*(-2)
2≥-2cos(x)≥-2
y∈[-2;2]