Question

question answered

Answer 1

This is a multiple choice question, so I can provide the choices if needed.

Answer 2

you know how graph of cosx looks like?

Answer 3

wavey

Answer 4

right. and at x=0 it is equal 1

Answer 5

here are my choices, maybe they will help.

Answer 6

im with you so far

Answer 7

from the graph of cosx you can see that it repeatedly goes from -1 through 0 to 1.
sec x = 1/cosx
so i think you can notice that when cosx=0 secx will have a problem. Right?

Answer 8

Right!

Answer 9

all the options are wavey and do this though

Answer 10

what will sec(x) be equal to when cos(x)=0 ?

Answer 11

0 as well? it can't be -0

Answer 12

it can aproach 0 from negative side of y-axis or from positive side. There is no such a thing like -0

Answer 13

what will sec(x) be equal to when cos(x)=0 ?

Answer 14

alright so A and B as well as C and D both have the same shaped wave, so is it the outer lines in the corners we need to look at?

Answer 15

cosx=1 at x=0. So A,B are not correct since there it equals 0 and not 1

Answer 16

Well having it narrowed down helps, how do we determine which of C and D is the correct answer now?

Answer 17

ask yourself this question:
what will sec(x) be equal to when cos(x)=0 ?

Answer 18

1?

Answer 19

I think i'm just going with C

Answer 20

thanks for the help

Answer 21

what is 1/0=?

Answer 22

you cannot divide by 0, can you?