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Aleks [24]
2 years ago
11

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 a

pply.
A. y=sec x
B. y= tan x
C. y= cot x
D. y= csc x
Mathematics
2 answers:
Dima020 [189]2 years ago
6 0

Answer:

A. y=sec x

D. y= csc x

Step-by-step explanation:

We have that,

Range of the functions is the set of all real numbers greater than or equal to 1 or less than or equal to -1.

As, we know that,

Range of the functions, y = tanx and y = cotx is (-\infty,\infty) i.e. the set of all real numbers.

So, options B and C are discarded.

Since, \csc x=\frac{1}{\sin x} and \sec x=\frac{1}{\cos x}.

Thus, their range will be greater than the the range of y = sinx and y = cosx.

Now, as it is known that the range of the functions  y = sinx and y = cosx is [-1,1].

Then, the range of y=sec x and y= csc x is the set of all real numbers greater than or equal to 1 or less than or equal to -1.

Hence, options A and D are correct.

kirill115 [55]2 years ago
5 0
I believe it is A and D
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