could someone please refresh my memory of the basic trig functions?
ex) cos^2 + sin^2 = 1?
That is a trig identity.
http://www.sosmath.com/trig/Trig5/trig5/trig5.html
ex) cos^2 + sin^2 = 1?
That is a trig identity.
http://www.sosmath.com/trig/Trig5/trig5/trig5.html