Tony, tan 25 deg = 0.46631 log (tan 25 deg) = -.33133 = 9.66867 - 10.0
Also, be careful of log base 10 vs. log base e, e = 2.71828... Gordon At 20:05 97/06/24 +0000, you wrote: >My printed tables give the log tan of 25° as 9.668 673 Can I use my >Casio fx 85s Scientific pocket calculator to achieve this result or do I >need a special type of calculator? | XII | Gordon T. Uber | XI | 3790 El Camino Real, Suite 142 | X \ /| Palo Alto, CA 94306-3314 | IX \ / | email: [EMAIL PROTECTED] CLOCKS and TIME: http://www.ubr.com/clocks/ Reynen & Uber WebDesign: http://www.ubr.com/rey&ubr