Question

I am lost.

Answer 1

The point P(9, 12) is on the terminal side of θ. Evaluate cos θ.

Answer 2

cosine you can think of is "adjacent over hypotenuse"
easiest thing to do is draw a triangle, then use pythagoras to find the hypotenuse of the triangle

Answer 3

ok, so do I like make a line from that point to the origin, use the distance formula and solve?

Answer 4

yes, you can think of it as the distance from the origin
, or just go ahead and compute
\[\sqrt{9^2+12^2}=15\]