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

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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.

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