Question

Find the domain and range of
y= 2-cosx

Answer 1

domain of cosx € every real number
max value of cos = 1
min value of cos =-1
for max value of y cosx should be min
y=2-(-1)=3(max value)
for min value of y cosx should be max
y=2-1=1(min value)
range of y is (1 to 3)