[Excuse_My_Bellicosity]

How much accuracy does a high school trig student need?

I don'k know. My HP-48 gives me sines, cosines, and tangents out to 12 decimal places. Any of your cheap scientific calculators that I've ever seen will give you better than 6 decimal places. I find Dr. Wildberger's remarks about accuracy suspicious.

[dr_who_2]

Same here.