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HP calculators older then the HP 48 use CORDIC for their trigonometric and logarithmic capabilities.

Do newer calculators such as HP 35s, TI 89 or TI NSPIRE do the same?

But, wouldn't that mean that the 48 series shared the same trig bugs as the 35S?

Edited: 28 Apr 2012, 8:31 p.m.

Yes, most calculators using CORDIC algorithms for their trigonometric and inverse trigonometric functions. HP used them starting with the 9100A desktop computer in 1968 through some of their latest calculators. I don't know whether CORDIC is used in the relatively recent HP-branded calculators that were not actually developed by HP.

No. The bugs weren't a fault of the CORDIC algorithm, but of the specific code implementing it.