The question is incomplete. Here is the complete question:
Which of the functions have a range of all real numbers greater than or equal to 1 or less than or equal to -1? check all that apply.
A. 
B. 
C. 
D. 
Answer:
A. 
D. 
Step-by-step explanation:
Given:
The range is greater than or equal to 1 or less than or equal to -1.
The given choices are:
Choice A: 
We know that, the 
The range of
is from -1 to 1 given as [-1, 1]. So,

Therefore, on removing the absolute sign, we rewrite the secant function as:

Therefore, the range of
is all real numbers greater than or equal to 1 or less than or equal to-1.
Choice B: 
We know that, the range of tangent function is all real numbers. So, choice B is incorrect.
Choice C: 
We know that, the range of cotangent function is all real numbers. So, choice C is incorrect.
Choice D: 
We know that, the 
The range of
is from -1 to 1 given as [-1, 1]. So,

Therefore, on removing the absolute sign, we rewrite the cosecant function as:

Therefore, the range of
is all real numbers greater than or equal to 1 or less than or equal to-1.