Next, we need to convert their forces to horizontal and vertical components. Let's use k for Kim's vector and n for Noah's vector. k = <30, 130o> = <30cos130o, 30sin130o> = <-19.3, 23.0>. n = <40, 65o> = <40cos65o, 40sin65o> = <16.9, 36.3>.
(The lower case o is rendered as a degree symbol)
To get the X part of Kim's vector, I run
30 * Math.cos(130), I get
-11.018739913640896, which is not -19.3.
To get the Y part of Kim's vector, I run
30 * Math.sin(130) which is
-27.903178505602853, which is not the
23.0 listed by the example.
Where did I go wrong?