Question 865288
 If the point (-5,-2)is on the terminal arm of N, an angle in standard position, what is the value of cos N?
------------
{{{r = sqrt(x^2 + y^2) = sqrt(25 + 4)}}}
{{{r = sqrt(29)}}}
cos = x/r
cos = -5/sqrt(29)
= {{{-5sqrt(29)/29}}}