I don't know how I am ever going to repay you for all the math help you have provided since we met. Honestly, this question is too hard for precalculus. Of course, this is only my opinion.
I took precalculus in the Spring 1993 semester at Lehman College. The graduate school student working on his PH.D. allowed to teach MA172 never talked about vectors, navigation, bearing, polar equations, etc. I got an A minus in the course. The toughest concept in that evening class , if memory serves me right, was learning to find the domain and range of functions, including trig functions. I don't even think he covered law of sines and law of cosines.
