method?
Fragment of a discussion from Science talk:Math Exam Resources/Courses/MATH100/December 2012/Question 05 (b)
This is taught in high school - or at least it was for me back in the day.
See http://www.bced.gov.bc.ca/irp/pdfs/mathematics/WNCPmath1012/2008math_precalc12.pdf Learning goal B10 goal 10.1
So I'd expect they have seen this before.
CarmenBruni (talk)