What is cos θ given (–2, –5) is a point on the terminal side of θ?

Question

anonymous · Answer

www.algebra.com/algebra/homework/Trigonometry-basics/Trigonometry-basics.faq.question.440963.html
might help with the answer

astrophysics · Answer

If the coordinate is (-2,-5) that's obviously the third quadrant right? We can make a triangle and figure out the hypotenuse using pythagorean theorem. |dw:1451579919245:dw| the triangle of course is not to scale. Then you may use your trig ratios.

astrophysics · Answer

Make sure you're careful as it's quadrant 3

er.mohd.amir · Answer

cos is -ve in III quradent.

anonymous · Answer

My options are:
5/2
-5√29/29
-2√29/29
5√29/29

anonymous · Answer

@Astrophysics

anonymous · Answer

ok give me a sec

anonymous · Answer

-2/-5?

er.mohd.amir · Answer

find 3rd side and dircet find cos

loser66 · Answer

@Astrophysics  give you the way to find hypotenuse of the right triangle. But you have to figure out where the theta is. My pic gave you where the theta is, right? |dw:1451581789289:dw|