Though it is higher level than this book appears to target, i had a similar issue with the obfuscation of the trig functions. Year after year i would ask my mat

Though it is higher level than this book appears to target, i had a similar issue with the obfuscation of the trig functions. Year after year i would ask my math teachers how to calculate sin and cos, to no avail. I remember sitting in a college math course as we deduced the geometric series that represents each positively giddy.