Using a unit circle what is the value of cot(-90degrees)

$$cot(-90)=\frac{cos(-90)}{sin(-90)}$$

Cos is given by the x value which is 0

sin is given by the y value which is -1

so

$$cot(-90)=\frac{cos(-90)}{sin(-90)}=\frac{0}{-1}=0$$

Do you understand?

Yes thank you, Im in math and im doing a worksheet with more Trig function problems to do and that was one section and i have 5 more sections to do, I understand how to do this part thank you, but I most likely will post just a couple more different problems. 

okay that is fine.

We are getting a lot of questions at the moment - more than we can handle but a lot of people are less serious about needing answers.  I am definitely not trying to put you off, I am just suggesting that if you don't get an answer after a few hours you can repost.  That is fine.  You probably won't need to we answer most questions quickly.

Welcome to the forum.

Melody.