Question

Which function has the range ? (-∞,0] ∪ [2,∞)
A. y=secx
B. y=csc(x)+1
C. y=cot(2x)-1
D. y=cos(x+1)

Answer 1

B

Answer 2

|csc(x)|>=1
csc(x)>=1 or cscx<=-1
cscx+1>=2 or cscx<=0 hence B

Answer 3

Hm dipank is correct B