Hi everyone, Attached is a diagram showing the problem and my work. I'm trying to find the magnitude of my vector in order to be able to get it in a x-y coordinate form. So far I haven't had any luck, with some magnitudes coming out to be negative! I don't know what I'm doing wrong, but obviously it's something big.

link to my diagram/work

https://mail.google.com/a/my.uri.edu....1&disp=emb&zw

Known, but arbitrary: . I need , and