For an angle Θ with the point (-5, -12) on its terminating side, what is the value of cosine?

Question

anonymous · Answer

|dw:1383176939606:dw|

anonymous · Answer

cosine (theta) = adjacent over hypotenuse 
 
where the hypotenuse is the length of the terminating side which is:

$$hypotenuse  = \sqrt{(-5)^{2}+(-12)^{2}}$$ then use the adjacent side (which is your (-5) here) then plug it into the equation of cosine(theta) as i mentioned up there.

anonymous · Answer

I got -0.384

anonymous · Answer

a. -5
b. -12
c.-5/13
d. -12/13

anonymous · Answer

where'd you get -0 .384 from?

anonymous · Answer

if you can answer that then that will answer your question. don't look at it in decimal form. look at it in fraction form.

anonymous · Answer

-5/13 OHOH okay i got it xD thank you

anonymous · Answer

I thought you were supposed to divide -5 by 13

anonymous · Answer

you are if they want it that way. But they gave you the answers in fraction form. So find your answer from there.

anonymous · Answer

@uri