Which function is undefined when x= pi/2 radians
cos x
cot x
csc x
tan x

Option 4 that is tan x will be undefined at x=pi/2 radians

Step-by-step explanation:

In case 1:

We have cos x

Therefore the function is defined hence, option 1 is discarded.

In case 2:

We have cot x and

Since,

And

Hence,

Hence, defined and Option 2 is discarded.

In case 3:

We have csc x and

Since,

Hence,

Hence, defined and Option 3 is discarded.

In case 4:

We have tan x and

Since,

And

Hence,

Hence, undefined and Option 4 is correct.

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step-by-step explanation:

the answer is a i belaeve atleast thats what my calculator just gfave me

step-by-step explanation: