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.

< 6 cm to > 26 cm i believe

step-by-step explanation:

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98