# Find the sec theta of (-2, -1) It's not -1/2??

• September 22nd 2012, 09:22 AM
avatartiger2
Find the sec theta of (-2, -1) It's not -1/2??
(-2, -1) Find sec theta. At first I thouht the answer was just -1/2 because x is cosine so you just flip it over for secant. But my teacher said I was wrong. What is the answer??
• September 22nd 2012, 09:41 AM
Plato
Re: Find the sec theta of (-2, -1) It's not -1/2??
Quote:

Originally Posted by avatartiger2
(-2, -1) Find sec theta. At first I thouht the answer was just -1/2 because x is cosine so you just flip it over for secant. But my teacher said I was wrong. What is the answer??

What is $\theta~?$. You failed to tell us anything about how the angle is formed.

We know that $(-2,-1)\in III$ then what?
• September 22nd 2012, 09:53 AM
avatartiger2
Re: Find the sec theta of (-2, -1) It's not -1/2??
I think the angle is formed by a right triangle. I think soh cah toa has to be used to find the answer..maybe.