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PeterK · 01 July 2018, 11:40

FACOS(1)=0 and FACOS(-1)=Pi are correct now in all modes. In 80-bit mode the LSB of Extended Precision is rounded to zero for Pi, but that's acceptable. It's more important that a zero point of a function is exactly 0.

01 July 2018, 11:40	#5
PeterK Registered User Join Date: Apr 2005 Location: digital hell, Germany, after 1984, but worse Posts: 3,365	FACOS(1)=0 and FACOS(-1)=Pi are correct now in all modes. In 80-bit mode the LSB of Extended Precision is rounded to zero for Pi, but that's acceptable. It's more important that a zero point of a function is exactly 0.