On Fri, Oct 16, 2015 at 10:14 PM, Jeffrey Sarnoff <[email protected]> wrote: > Is there a way to use sin(x)^2 + cos(x)^2 = 1 to refine very close > approximations to sin(x), cos(x)? > I am using an extended precision, so I have Float64 approximations for > sin,cos for 'free'. >
I would guess any library you use to deal with those higher precision numbers already handle this internally (e.g. `sin(::BigFloat)`) Also, I doubt sin^2 + cos^2 = 1 would help since it doesn't explicitly include x.
